code cleanup: spelling

intern/ffmpeg/ffmpeg_compat.h

@@ -2,7 +2,7 @@
  * compatibility macros to make every ffmpeg installation appear
  * like the most current installation (wrapping some functionality sometimes)
  * it also includes all ffmpeg header files at once, no need to do it 
- * seperately.
+ * separately.
  *
  * Copyright (c) 2011 Peter Schlaile
  *

intern/ghost/intern/GHOST_SystemCocoa.mm

@@ -525,7 +525,7 @@ int cocoa_request_qtcodec_settings(bContext *C, wmOperator *op)
 		return NSTerminateCancel;
 }
 
-// To avoid cancelling a log off process, we must use Cocoa termination process
+// To avoid canceling a log off process, we must use Cocoa termination process
 // And this function is the only chance to perform clean up
 // So WM_exit needs to be called directly, as the event loop will never run before termination
 - (void)applicationWillTerminate:(NSNotification *)aNotification