- bugfix #492

"Waste cpu while rotating view"
  I added a tiny idle in the 'wait_for_statechanged' call, I suspect
  ghostwinlay returns events while holding mousebutton...

source/blender/src/editscreen.c

@@ -1605,6 +1605,8 @@ void BIF_wait_for_statechange(void)
 		}
 		statechanged= 0;
 	}
+	else PIL_sleep_ms(3);	/* statechanged can be set '1' while holding mousebutton, causing locks */
+
 }
 void getmouse(short *mval)
 {

source/blender/src/view.c

@@ -521,8 +521,10 @@ void viewmove(int mode)
 			scrarea_do_windraw(curarea);
 			screen_swapbuffers();
 		}
-		else BIF_wait_for_statechange();
-
+		else {
+			BIF_wait_for_statechange();
+		}
+		
 		/* this in the end, otherwise get_mbut does not work on a PC... */
 		if( !(get_mbut() & (L_MOUSE|M_MOUSE))) break;
 	}