Fix an off-by-one assert() in the virtual table argument tokenizer.

FossilOrigin-Name: c83052e48bbae0f45db2a44155b4e5482ee4a901

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sbroken\sassert()\sand\scomparison\sfor\sINSERT\sINTO\s...\sSELECT\swhen\sthe\nSELECT\suses\san\sunknown\scollating\ssequence.
-D 2015-04-19T22:41:22.682
+C Fix\san\soff-by-one\sassert()\sin\sthe\svirtual\stable\sargument\stokenizer.
+D 2015-04-19T23:11:10.399
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in faaf75b89840659d74501bea269c7e33414761c1
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -302,7 +302,7 @@ F src/vdbeblob.c 4f2e8e075d238392df98c5e03a64342465b03f90
 F src/vdbemem.c c0dc81285b7571b0a31c40f17846fe2397ec1cd9
 F src/vdbesort.c 2e7f683464fd5db3be4beaa1ff2d39e24fcb64b8
 F src/vdbetrace.c f95c2dff9041fcf07f871789c22ebb0648ea0b7c
-F src/vtab.c 4feb365e2688dd02474e671e37f27e35784d2cff
+F src/vtab.c 5f81f8a59c1f5ddb94c918f25ed5d83578fcc633
 F src/vxworks.h c18586c8edc1bddbc15c004fa16aeb1e1342b4fb
 F src/wal.c 753995db83247f20361a8e8a874990b21a75abd9
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
@@ -1251,7 +1251,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 2cb37b959c66b5ae3535ab81ba14a4ebf9732df7
-R e2cf191d4292c134d8577e2e34e33df7
+P e73ac0cbac257d2d2b28e51423e30d7449b6c7b5
+R 70d28450bd13a75aeed954614a2f2b46
 U drh
-Z 7931b9be35191227870d2d70e1da695e
+Z 2b960b7774bbbdaf4d5bf53bdfe32951

manifest.uuid

@@ -1 +1 @@
-e73ac0cbac257d2d2b28e51423e30d7449b6c7b5
+c83052e48bbae0f45db2a44155b4e5482ee4a901

src/vtab.c

@@ -472,7 +472,7 @@ void sqlite3VtabArgExtend(Parse *pParse, Token *p){
     pArg->z = p->z;
     pArg->n = p->n;
   }else{
-    assert(pArg->z < p->z);
+    assert(pArg->z <= p->z);
     pArg->n = (int)(&p->z[p->n] - pArg->z);
   }
 }