* 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/sys/sys_local.h

@@ -47,6 +47,7 @@ unsigned int CON_LogRead( char *out, unsigned int outSize );
 char *Sys_StripAppBundle( char *pwd );
 #endif
 
+void Sys_GLimpInit( void );
 void Sys_PlatformInit( void );
 void Sys_SigHandler( int signal );
 void Sys_ErrorDialog( const char *error );