fixed the xmlLineNumbersDefault() errors, lesson don't add new functions

* parser.c parserInternals.c: fixed the xmlLineNumbersDefault()
  errors, lesson don't add new functions at 1am before a release
* xpath.c: integrated fix from Bjorn to avoid divide by zero
  from XPath initialization when possible.
Daniel

parserInternals.c

@@ -49,6 +49,24 @@
 
 void xmlUpgradeOldNs(xmlDocPtr doc);
 
+/*
+ * Various global defaults for parsing
+ */
+int xmlGetWarningsDefaultValue = 1;
+#ifdef VMS
+int xmlSubstituteEntitiesDefaultVal = 0;
+#define xmlSubstituteEntitiesDefaultValue xmlSubstituteEntitiesDefaultVal 
+int xmlDoValidityCheckingDefaultVal = 0;
+#define xmlDoValidityCheckingDefaultValue xmlDoValidityCheckingDefaultVal
+#else
+int xmlSubstituteEntitiesDefaultValue = 0;
+int xmlDoValidityCheckingDefaultValue = 0;
+#endif
+int xmlLoadExtDtdDefaultValue = 0;
+int xmlPedanticParserDefaultValue = 0;
+int xmlLineNumbersDefaultValue = 0;
+int xmlKeepBlanksDefaultValue = 1;
+
 /************************************************************************
  *									*
  * 		Version and Features handling				*
@@ -2230,7 +2248,7 @@ xmlInitParserCtxt(xmlParserCtxtPtr ctxt)
     ctxt->loadsubset = xmlLoadExtDtdDefaultValue;
     ctxt->validate = xmlDoValidityCheckingDefaultValue;
     ctxt->pedantic = xmlPedanticParserDefaultValue;
-    ctxt->linenumbers = xmlPedanticParserDefaultValue;
+    ctxt->linenumbers = xmlLineNumbersDefaultValue;
     ctxt->keepBlanks = xmlKeepBlanksDefaultValue;
     ctxt->vctxt.userData = ctxt;
     if (ctxt->validate) {
@@ -2488,6 +2506,101 @@ xmlParserAddNodeInfo(xmlParserCtxtPtr ctxt,
   }   
 }
 
+/************************************************************************
+ *									*
+ *		Defaults settings					*
+ *									*
+ ************************************************************************/
+/**
+ * xmlPedanticParserDefault:
+ * @val:  int 0 or 1 
+ *
+ * Set and return the previous value for enabling pedantic warnings.
+ *
+ * Returns the last value for 0 for no substitution, 1 for substitution.
+ */
+
+int
+xmlPedanticParserDefault(int val) {
+    int old = xmlPedanticParserDefaultValue;
+
+    xmlPedanticParserDefaultValue = val;
+    return(old);
+}
+
+/**
+ * xmlLineNumbersDefault:
+ * @val:  int 0 or 1 
+ *
+ * Set and return the previous value for enabling line numbers in elements
+ * contents. This may break on old application and is turned off by default.
+ *
+ * Returns the last value for 0 for no substitution, 1 for substitution.
+ */
+
+int
+xmlLineNumbersDefault(int val) {
+    int old = xmlLineNumbersDefaultValue;
+
+    xmlLineNumbersDefaultValue = val;
+    return(old);
+}
+
+/**
+ * xmlSubstituteEntitiesDefault:
+ * @val:  int 0 or 1 
+ *
+ * Set and return the previous value for default entity support.
+ * Initially the parser always keep entity references instead of substituting
+ * entity values in the output. This function has to be used to change the
+ * default parser behaviour
+ * SAX::subtituteEntities() has to be used for changing that on a file by
+ * file basis.
+ *
+ * Returns the last value for 0 for no substitution, 1 for substitution.
+ */
+
+int
+xmlSubstituteEntitiesDefault(int val) {
+    int old = xmlSubstituteEntitiesDefaultValue;
+
+    xmlSubstituteEntitiesDefaultValue = val;
+    return(old);
+}
+
+/**
+ * xmlKeepBlanksDefault:
+ * @val:  int 0 or 1 
+ *
+ * Set and return the previous value for default blanks text nodes support.
+ * The 1.x version of the parser used an heuristic to try to detect
+ * ignorable white spaces. As a result the SAX callback was generating
+ * ignorableWhitespace() callbacks instead of characters() one, and when
+ * using the DOM output text nodes containing those blanks were not generated.
+ * The 2.x and later version will switch to the XML standard way and
+ * ignorableWhitespace() are only generated when running the parser in
+ * validating mode and when the current element doesn't allow CDATA or
+ * mixed content.
+ * This function is provided as a way to force the standard behaviour 
+ * on 1.X libs and to switch back to the old mode for compatibility when
+ * running 1.X client code on 2.X . Upgrade of 1.X code should be done
+ * by using xmlIsBlankNode() commodity function to detect the "empty"
+ * nodes generated.
+ * This value also affect autogeneration of indentation when saving code
+ * if blanks sections are kept, indentation is not generated.
+ *
+ * Returns the last value for 0 for no substitution, 1 for substitution.
+ */
+
+int
+xmlKeepBlanksDefault(int val) {
+    int old = xmlKeepBlanksDefaultValue;
+
+    xmlKeepBlanksDefaultValue = val;
+    xmlIndentTreeOutput = !val;
+    return(old);
+}
+
 /************************************************************************
  *									*
  *		Deprecated functions kept for compatibility		*