Fixed compile warnings with gcc 4

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401199

src/video/SDL_blit.c

@@ -116,7 +116,7 @@ static int SDL_SoftBlit(SDL_Surface *src, SDL_Rect *srcrect,
 }
 
 #ifdef MMX_ASMBLIT
-static __inline__ void SDL_memcpyMMX(char* to,char* from,int len)
+static __inline__ void SDL_memcpyMMX(Uint8 *to, const Uint8 *from, int len)
 {
 	int i;
 
@@ -132,7 +132,7 @@ static __inline__ void SDL_memcpyMMX(char* to,char* from,int len)
 		SDL_memcpy(to, from, len&7);
 }
 
-static __inline__ void SDL_memcpySSE(char* to,char* from,int len)
+static __inline__ void SDL_memcpySSE(Uint8 *to, const Uint8 *from, int len)
 {
 	int i;
 

src/video/x11/SDL_x11events.c

@@ -613,7 +613,7 @@ void X11_InitKeymap(void)
 }
 
 #ifdef X_HAVE_UTF8_STRING
-Uint32 Utf8ToUcs4(const char * utf8)
+Uint32 Utf8ToUcs4(const unsigned char *utf8)
 {
 	Uint32 c;
 	int i = 1;

src/video/x11/SDL_x11gl.c

@@ -532,7 +532,7 @@ void *X11_GL_GetProcAddress(_THIS, const char* proc)
 	
 	handle = this->gl_config.dll_handle;
 	if ( this->gl_data->glXGetProcAddress ) {
-		return this->gl_data->glXGetProcAddress(proc);
+		return this->gl_data->glXGetProcAddress((const GLubyte *)proc);
 	}
 #if defined(__OpenBSD__) && !defined(__ELF__)
 #undef do_dlsym

src/video/x11/SDL_x11modes.c

@@ -49,7 +49,7 @@ static char rcsid =
 Bool SDL_NAME(XF86VidModeGetModeInfo)(Display *dpy, int scr, SDL_NAME(XF86VidModeModeInfo) *info)
 {
     SDL_NAME(XF86VidModeModeLine) *l = (SDL_NAME(XF86VidModeModeLine)*)((char*)info + sizeof info->dotclock);
-    return SDL_NAME(XF86VidModeGetModeLine)(dpy, scr, &info->dotclock, l);
+    return SDL_NAME(XF86VidModeGetModeLine)(dpy, scr, (int*)&info->dotclock, l);
 }
 #endif /* XFREE86_VM */
 

src/video/x11/SDL_x11yuv.c

@@ -103,8 +103,8 @@ SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, S
 	SDL_Overlay *overlay;
 	struct private_yuvhwdata *hwdata;
 	int xv_port;
-	int i, j, k;
-	int adaptors;
+	unsigned int i, j, k;
+	unsigned int adaptors;
 	SDL_NAME(XvAdaptorInfo) *ainfo;
 	int bpp;
 #ifndef NO_SHARED_MEMORY