minor fixes to errors mentioned

mapchooser_extended/scripting/nominations_extended.sp

@@ -174,7 +174,7 @@ public void sql_select_hiding_unavailable_maps(int client)
 
 public void SQL_OnQueryCompleted_ignoring(Database db, DBResultSet results, const char[] error, int Serial)
 {
-    if (!db)
+    if (!db || results == INVALID_HANDLE)
     {
         delete results;
         return;
@@ -189,7 +189,9 @@ public void SQL_OnQueryCompleted_ignoring(Database db, DBResultSet results, cons
     {
         int val = 0;
         if (results.RowCount && results.FetchRow())
+        {
             val = results.FetchInt(0);
+        }
         if (val == 1)
         {
             g_bClientsIgnoring[client] = true;