GUI: possibly fix hang after factory reset

issue #2576

src/engine/configEngine.cpp

@@ -193,6 +193,4 @@ void DivEngine::factoryReset() {
     if (i>0) path+=fmt::sprintf(".%d",i);
     deleteFile(path.c_str());
   }
-
-  exit(0);
 }

src/gui/gui.cpp

@@ -6573,6 +6573,7 @@ bool FurnaceGUI::loop() {
           if (ImGui::Button(_("Yes"))) {
             e->factoryReset();
             quit=true;
+            quitNoSave=true;
             ImGui::CloseCurrentPopup();
           }
           popDestColor();
@@ -8378,13 +8379,15 @@ void FurnaceGUI::commitState(DivConfig& conf) {
 }
 
 bool FurnaceGUI::finish(bool saveConfig) {
-  commitState(e->getConfObject());
-  if (userPresetsOpen) {
-    saveUserPresets(true);
-  }
-  if (saveConfig) {
-    logI("saving config.");
-    e->saveConf();
+  if (!quitNoSave) {
+    commitState(e->getConfObject());
+    if (userPresetsOpen) {
+      saveUserPresets(true);
+    }
+    if (saveConfig) {
+      logI("saving config.");
+      e->saveConf();
+    }
   }
   rend->quitGUI();
   ImGui_ImplSDL2_Shutdown();
@@ -8484,6 +8487,7 @@ FurnaceGUI::FurnaceGUI():
   replacePendingSample(false),
   displayExportingROM(false),
   displayExportingCS(false),
+  quitNoSave(false),
   changeCoarse(false),
   mobileEdit(false),
   killGraphics(false),

src/gui/gui.h

@@ -1677,6 +1677,7 @@ class FurnaceGUI {
   bool displayPendingIns, pendingInsSingle, displayPendingRawSample, snesFilterHex, modTableHex, displayEditString;
   bool displayPendingSamples, replacePendingSample;
   bool displayExportingROM, displayExportingCS;
+  bool quitNoSave;
   bool changeCoarse;
   bool mobileEdit;
   bool killGraphics;