Fix an #ifdef of SQLITE_OMIT_VIRTUALTABLE that had an extra "_" character.

FossilOrigin-Name: 93e0be2bbf16d66d97ea7344187139d254b11cc3

src/vdbe.c

@@ -2585,7 +2585,7 @@ case OP_Savepoint: {
     }else{
       nName = sqlite3Strlen30(zName);
 
-#ifndef SQLITE_OMIT_VIRTUAL_TABLE
+#ifndef SQLITE_OMIT_VIRTUALTABLE
       /* This call is Ok even if this savepoint is actually a transaction
       ** savepoint (and therefore should not prompt xSavepoint()) callbacks.
       ** If this is a transaction savepoint being opened, it is guaranteed