fcmp: Fix bogus "query failed" message

When the modpack installer updates an already installed modpack, it
emits a bogus critical message that a query failed with error code 100.

Error code 100 is `SQLITE_ROW` and is not really an error, but signals
that a data row has been successfully read. `SQLITE_ROW` is also an
expected return value in `mpdb_update_modpack`.

Change the check for failed to queries to ignore `SQLITE_ROW`.

tools/fcmp/mpdb.cpp

@@ -115,7 +115,7 @@ static int mpdb_query(sqlite3 *handle, const char *query)
     ret = sqlite3_finalize(stmt);
   }
 
-  if (ret != SQLITE_OK) {
+  if (ret != SQLITE_OK && ret != SQLITE_ROW) {
     qCritical("Query \"%s\" failed. (%d)", query, ret);
   }