Fix crash when one of the lobby keys which was supposed to be an int was not an int.

dll/steam_matchmaking.h

@@ -1152,7 +1152,8 @@ void RunCallbacks()
                             }
                         }
                     } else {
-                        int compare_to = stoi(value->second, 0, 0);
+                        try {
+                            int compare_to = std::stoi(value->second, 0, 0);
                             PRINT_DEBUG("Compare Values %i %i\n", compare_to, f.value_int);
                             if (f.eComparisonType == k_ELobbyComparisonEqual) {
                                 if (compare_to == f.value_int) {
@@ -1163,6 +1164,10 @@ void RunCallbacks()
                                     use = false;
                                 }
                             }
+                        } catch (...) {
+                            //Same case as if the key is not in the lobby?
+                            use = false;
+                        }
                         //TODO: add more comparisons
                     }
                 } else {