[gimp] Fix typo in header guard

[Daniel Sabo <daniels src gnome org>]

commit cbf13b9e5df112dda232664e22d620929839adb5
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Fri May 2 19:24:56 2014 -0700

    Fix typo in header guard
    
    Causes a warning when building with clang

 app/plug-in/gimppluginprocframe.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/plug-in/gimppluginprocframe.h b/app/plug-in/gimppluginprocframe.h
index e7709be..14fd514 100644
--- a/app/plug-in/gimppluginprocframe.h
+++ b/app/plug-in/gimppluginprocframe.h
@@ -18,7 +18,7 @@
  */
 
 #ifndef __GIMP_PLUG_IN_PROC_FRAME_H__
-#define __GIMP_PLUG_IN_PRON_FRAME_H__
+#define __GIMP_PLUG_IN_PROC_FRAME_H__
 
 
 struct _GimpPlugInProcFrame