Fixed bug 5005 - warnings in kmsdrm

Malte Kie?ling

At the moment i get following warnings from kmsdrm:

 * in SDL_kmsdrmvideo.c KMSDRM_DestroySurfaces is return type int, but thats never returned or checked against
 * in SDL_kmsdrmvideo.c KMSDRM_DestroySurfaces the variable viddata is not used
 * in SDL_kmsdrmopengles.c KMSDRM_GLES_LoadLibrary a cast to NativeDisplayType is missing

I attached a patch for them :)

src/video/kmsdrm/SDL_kmsdrmopengles.c

@@ -37,7 +37,8 @@
 
 int
 KMSDRM_GLES_LoadLibrary(_THIS, const char *path) {
-    return SDL_EGL_LoadLibrary(_this, path, ((SDL_VideoData *)_this->driverdata)->gbm, EGL_PLATFORM_GBM_MESA);
+    NativeDisplayType display = (NativeDisplayType)((SDL_VideoData *)_this->driverdata)->gbm;
+    return SDL_EGL_LoadLibrary(_this, path, display, EGL_PLATFORM_GBM_MESA);
 }
 
 SDL_EGL_CreateContext_impl(KMSDRM)

src/video/kmsdrm/SDL_kmsdrmvideo.c

@@ -349,10 +349,9 @@ KMSDRM_WaitPageFlip(_THIS, SDL_WindowData *windata, int timeout) {
 /* SDL Video and Display initialization/handling functions                   */
 /* _this is a SDL_VideoDevice *                                              */
 /*****************************************************************************/
-static int
+static void
 KMSDRM_DestroySurfaces(_THIS, SDL_Window * window)
 {
-    SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
     SDL_WindowData *windata = (SDL_WindowData *)window->driverdata;
 
     KMSDRM_WaitPageFlip(_this, windata, -1);