Fix various warnings

code/renderercommon/tr_image_bmp.c

@@ -54,7 +54,7 @@ void R_LoadBMP( const char *name, byte **pic, int *width, int *height )
 		byte *b;
 		void *v;
 	} buffer;
-	int		length;
+	unsigned	length;
 	BMPHeader_t bmpHeader;
 	byte		*bmpRGBA;
 
@@ -164,7 +164,7 @@ void R_LoadBMP( const char *name, byte **pic, int *width, int *height )
 	numPixels = columns * rows;
 
 	if(columns <= 0 || !rows || numPixels > 0x1FFFFFFF // 4*1FFFFFFF == 0x7FFFFFFC < 0x7FFFFFFF
-	    || ((numPixels * 4) / columns) / 4 != rows)
+	    || (((int)numPixels * 4) / columns) / 4 != rows)
 	{
 	  ri.Error (ERR_DROP, "LoadBMP: %s has an invalid image size", name);
 	}

code/renderercommon/tr_image_png.c

@@ -532,7 +532,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 
 	if(!(BF && Buffer))
 	{
-		return(-1);
+		return((uint32_t)-1);
 	}
 
 	/*
@@ -553,7 +553,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 
 	if(!FindChunk(BF, PNG_ChunkType_IDAT))
 	{
-		return(-1);
+		return((uint32_t)-1);
 	}
 
 	/*
@@ -576,7 +576,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 
 			BufferedFileRewind(BF, BytesToRewind);
 
-			return(-1);
+			return((uint32_t)-1);
 		}
 
 		/*
@@ -613,7 +613,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 			{
 				BufferedFileRewind(BF, BytesToRewind);
 
-				return(-1);
+				return((uint32_t)-1);
 			}
 
 			BytesToRewind += Length + PNG_ChunkCRC_Size;
@@ -626,7 +626,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 	CompressedData = ri.Malloc(CompressedDataLength);
 	if(!CompressedData)
 	{
-		return(-1);
+		return((uint32_t)-1);
 	}
 
 	CompressedDataPtr = CompressedData;
@@ -646,7 +646,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 		{
 			ri.Free(CompressedData); 
 
-			return(-1);
+			return((uint32_t)-1);
 		}
 
 		/*
@@ -680,14 +680,14 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 			{
 				ri.Free(CompressedData); 
 
-				return(-1);
+				return((uint32_t)-1);
 			}
 
 			if(!BufferedFileSkip(BF, PNG_ChunkCRC_Size))
 			{
 				ri.Free(CompressedData); 
 
-				return(-1);
+				return((uint32_t)-1);
 			}
 
 			memcpy(CompressedDataPtr, OrigCompressedData, Length);
@@ -718,7 +718,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 	{
 		ri.Free(CompressedData);
 
-		return(-1);
+		return((uint32_t)-1);
 	}
 
 	/*
@@ -730,7 +730,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 	{
 		ri.Free(CompressedData);
 
-		return(-1);
+		return((uint32_t)-1);
 	}
 
 	/*
@@ -761,7 +761,7 @@ static uint32_t DecompressIDATs(struct BufferedFile *BF, uint8_t **Buffer)
 	{
 		ri.Free(DecompressedData);
 
-		return(-1);
+		return((uint32_t)-1);
 	}
 
 	/*
@@ -2364,7 +2364,7 @@ void R_LoadPNG(const char *name, byte **pic, int *width, int *height)
 	 *  Rewind to the start of the file.
 	 */
 
-	if(!BufferedFileRewind(ThePNG, -1))
+	if(!BufferedFileRewind(ThePNG, (unsigned)-1))
 	{
 		CloseBufferedFile(ThePNG);
 

code/renderercommon/tr_image_tga.c

@@ -42,7 +42,7 @@ void R_LoadTGA ( const char *name, byte **pic, int *width, int *height)
 {
 	unsigned	columns, rows, numPixels;
 	byte	*pixbuf;
-	int		row, column;
+	unsigned	row, column;
 	byte	*buf_p;
 	byte	*end;
 	union {
@@ -190,7 +190,8 @@ void R_LoadTGA ( const char *name, byte **pic, int *width, int *height)
 		}
 	}
 	else if (targa_header.image_type==10) {   // Runlength encoded RGB images
-		unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
+		unsigned char red = 0, green = 0, blue = 0, alphabyte = 0;
+		unsigned char packetHeader, packetSize, j;
 
 		for(row=rows-1; row>=0; row--) {
 			pixbuf = targa_rgba + row*columns*4;