Added mouse support for linux. It is still rather crude, but it works.

Unfortunately the mouse pointer doesn't match up very well with the IR pointer yet.
Also, I had to add the PointerMotionMask to XSelectInput which adds overhead to the already stressed X event loops.  Five event loops by my count, really?


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4961 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoOGL/Src/GLUtil.cpp

@@ -431,7 +431,7 @@ bool OpenGL_MakeCurrent()
     
     // better for pad plugin key input (thc)
     XSelectInput(GLWin.dpy, GLWin.win, ExposureMask | KeyPressMask | ButtonPressMask | KeyReleaseMask | ButtonReleaseMask | StructureNotifyMask | EnterWindowMask | LeaveWindowMask |
-                 FocusChangeMask );
+                 FocusChangeMask | PointerMotionMask );
 #endif
 	return true;
 }