Bug 778284 - Release howto should mention to close all running...

...instances of GIMP before a make distcheck

Mention it in release-howto.txt.

devel-docs/release-howto.txt

@@ -63,6 +63,9 @@
 
      [ ] Run 'make' to do a complete build of the source tree.
 
+     [ ] Close all running GIMP instances, we don't want any unique
+         code called during 'make distcheck'.
+
      [ ] Run 'make distcheck'. Avoid passing make -j since that can
          cause mysterious fails.