Return a proper value

redis_sock_read_multibulk_reply_zipped_with_flag should always return
a value.  We merged in a change that handled a certain error condition
that was using RETURN_FALSE (and therefore not returning a value)

Simply changed this to RETVAL_FALSE and return -1;

Author: michael-grunder

library.c

@@ -720,7 +720,7 @@ PHPAPI int redis_sock_read_multibulk_reply_zipped_with_flag(INTERNAL_FUNCTION_PA
         IF_MULTI_OR_PIPELINE() {
             add_next_index_bool(z_tab, 0);
         } else {
-            RETURN_FALSE;
+            RETVAL_FALSE;
         }
         return -1;
     }