* Add Sys_GLimpInit for platform specific GLimp initialisation

* Move Unix specific signal handlers to Sys_PlatformInit
* (Windows only) Don't set the SDL video driver if SDL_VIDEODRIVER is already
  set externally
* (Windows only) Use the "windib" SDL video driver if in_mouse is set to -1

code/sdl/sdl_glimp.c

@@ -416,7 +416,8 @@ static qboolean GLimp_StartDriverAndSetMode( int mode, qboolean fullscreen )
 
 		if (SDL_Init(SDL_INIT_VIDEO) == -1)
 		{
-			ri.Printf( PRINT_ALL, "SDL_Init FAILED (%s)\n", SDL_GetError());
+			ri.Printf( PRINT_ALL, "SDL_Init( SDL_INIT_VIDEO ) FAILED (%s)\n",
+					SDL_GetError());
 			return qfalse;
 		}
 
@@ -642,6 +643,8 @@ void GLimp_Init( void )
 
 	r_allowSoftwareGL = ri.Cvar_Get( "r_allowSoftwareGL", "0", CVAR_LATCH );
 
+	Sys_GLimpInit( );
+
 	// create the window and set up the context
 	if( !GLimp_StartDriverAndSetMode( r_mode->integer, r_fullscreen->integer ) )
 	{
@@ -679,8 +682,6 @@ void GLimp_Init( void )
 
 	// This depends on SDL_INIT_VIDEO, hence having it here
 	IN_Init( );
-
-	return;
 }