[TD-6011]<fix>: where clause including 'bool' Keyword causes core dump

src/common/src/tvariant.c

@@ -38,12 +38,12 @@ void tVariantCreate(tVariant *pVar, SStrToken *token) {
 
   switch (token->type) {
     case TSDB_DATA_TYPE_BOOL: {
-      int32_t k = strncasecmp(token->z, "true", 4);
-      if (k == 0) {
+      if (strncasecmp(token->z, "true", 4) == 0) {
         pVar->i64 = TSDB_TRUE;
-      } else {
-        assert(strncasecmp(token->z, "false", 5) == 0);
+      } else if (strncasecmp(token->z, "false", 5) == 0) {
         pVar->i64 = TSDB_FALSE;
+      } else {
+        return;
       }
 
       break;