Add missing "do { ... } while(0)" in ODBC macros and add find_baddefs

script.

src/tools/find_baddefs

@@ -0,0 +1,19 @@
+#!/bin/sh
+# This script attempts to find bad ifdef's, i.e. ifdef's that use braces
+# but not the do { ... } while (0) syntax
+#
+# This is useful for running before pgindent
+
+for FILE
+do
+	awk '	BEGIN		{was_define = "N"}
+				{ if (was_define == "Y" &&
+				      $0 ~ /^{/)
+					printf "%s  %d\n", FILENAME, NR
+				  if ($0 ~ /^#define/)
+					was_define = "Y"
+				  else
+					was_define = "N"
+				}' $FILE
+done
+