Fix some of PVS-Studio warnings.

src/GBI.h

@@ -462,7 +462,7 @@ typedef struct
 typedef struct
 {
 	s16 y, x;
-	u16	flag;
+	u16 flag;
 	s16 z;
 } SWVertex;
 
@@ -478,9 +478,10 @@ typedef void (*GBIFunc)( u32 w0, u32 w1 );
 
 struct MicrocodeInfo
 {
-	u32 address, dataAddress;
-	u16 dataSize;
-	u32 type;
+	u32 address = 0;
+	u32 dataAddress = 0;;
+	u16 dataSize = 0;
+	u32 type = NONE;
 	bool NoN = false;
 	bool Rej = false;
 	bool cullBoth = true;

src/Graphics/OpenGLContext/mupen64plus/mupen64plus_DisplayWindow.cpp

@@ -192,6 +192,8 @@ void DisplayWindowMupen64plus::_readScreen2(void * _dest, int * _width, int * _h
 		return;
 
 	u8 *pBufferData = (u8*)malloc((*_width)*(*_height) * 4);
+	if (pBufferData == nullptr)
+		return;
 	u8 *pDest = (u8*)_dest;
 
 #if !defined(OS_ANDROID) && !defined(OS_IOS)

src/TexrectDrawer.h

@@ -49,7 +49,7 @@ private:
 	std::vector<RectCoords> m_vecRectCoords;
 
 	struct iRect {
-		s32 ulx, uly, lrx, lry;
+		s32 ulx = 0, uly = 0, lrx = 0, lry = 0;
 	};
 	iRect _getiRect(u32 w0, u32 w1) const;
 	iRect m_curRect;

src/Textures.cpp

@@ -598,6 +598,7 @@ void _calcTileSizes(u32 _t, TileSizes & _sizes, gDPTile * _pLoadTile)
 	u32 tileHeight = ((pTile->lrt - pTile->ult) & 0x03FF) + 1;
 	if (tileWidth == 1 && tileHeight == 1 &&
 		gDP.otherMode.cycleType == G_CYC_COPY &&
+		_pLoadTile != nullptr &&
 		_pLoadTile->loadType == LOADTYPE_BLOCK) {
 		const u32 ulx = _SHIFTR(RDP.w1, 14, 10);
 		const u32 uly = _SHIFTR(RDP.w1, 2, 10);

src/uCodes/F5Indi_Naboo.cpp

@@ -2277,9 +2277,8 @@ void F5INDI_MoveWord(u32 _w0, u32 _w1)
 static
 void F5INDI_SetOtherMode(u32 w0, u32 w1)
 {
-	s32 AT = 0x80000000;
-	AT >>= _SHIFTR(w0, 0, 5);
-	u32 mask = u32(AT) >> _SHIFTR(w0, 8, 5);
+	u32 mask = (s32)0x80000000 >> _SHIFTR(w0, 0, 5);
+	mask >>= _SHIFTR(w0, 8, 5);
 
 	const u32 A0 = _SHIFTR(w0, 16, 3);
 	if (A0 == 0) {