fix some UB

src/DMA.cpp

@@ -79,6 +79,7 @@ void DMA::Reset()
     Stall = false;
 
     Running = false;
+    Executing = false;
     InProgress = false;
     MRAMBurstCount = 0;
 }

src/NonStupidBitfield.h

@@ -144,9 +144,10 @@ struct NonStupidBitField
     {
         for (u32 i = 0; i < DataLength; i++)
         {
-            u32 idx = __builtin_ctzll(Data[i]);
+            if (Data[i])
-            if (Data[i] && idx + i * 64 < Size)
             {
+                u32 idx = __builtin_ctzll(Data[i]);
+                if (idx + i * 64 < Size)
                     return {*this, i, idx, Data[i] & ~(1ULL << idx)};
             }
         }

src/frontend/qt_sdl/Config.cpp

@@ -301,7 +301,7 @@ ConfigEntry ConfigFile[] =
     {"AudioInterp", 0, &AudioInterp, 0, false},
     {"AudioBitDepth", 0, &AudioBitDepth, 0, false},
     {"AudioVolume", 0, &AudioVolume, 256, true},
-    {"DSiVolumeSync", 0, &DSiVolumeSync, 0, true},
+    {"DSiVolumeSync", 1, &DSiVolumeSync, false, true},
     {"MicInputType", 0, &MicInputType, 1, false},
     {"MicDevice", 2, &MicDevice, (std::string)"", false},
     {"MicWavPath", 2, &MicWavPath, (std::string)"", false},

src/frontend/qt_sdl/ROMManager.cpp

@@ -451,6 +451,7 @@ void UnloadCheats()
     {
         delete CheatFile;
         CheatFile = nullptr;
+        AREngine::SetCodeFile(nullptr);
     }
 }