Backport SQLite memcmp patch.

third_party/sqlite/src/src/vdbeapi.c

 /*
 ** 2004 May 26
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
@@ skipping 1204 matching lines @@
 */
 int sqlite3VdbeParameterIndex(Vdbe *p, const char *zName, int nName){
   int i;
   if( p==0 ){
     return 0;
   }
   createVarMap(p); 
   if( zName ){
     for(i=0; i<p->nVar; i++){
       const char *z = p->azVar[i];
-      if( z && memcmp(z,zName,nName)==0 && z[nName]==0 ){
+      if( z && strncmp(z,zName,nName)==0 && z[nName]==0 ){
         return i+1;
       }
     }
   }
   return 0;
 }
 int sqlite3_bind_parameter_index(sqlite3_stmt *pStmt, const char *zName){
   return sqlite3VdbeParameterIndex((Vdbe*)pStmt, zName, sqlite3Strlen30(zName));
 }
 
@@ skipping 81 matching lines @@
 
 /*
 ** Return the value of a status counter for a prepared statement
 */
 int sqlite3_stmt_status(sqlite3_stmt *pStmt, int op, int resetFlag){
   Vdbe *pVdbe = (Vdbe*)pStmt;
   int v = pVdbe->aCounter[op-1];
   if( resetFlag ) pVdbe->aCounter[op-1] = 0;
   return v;
 }