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Code looks like it intended to parse "%%" in pattern string as "%".  Fix
it, so it really does that.

Compile and run tested.
Signed-off-by: Domen Puncer <domen@coderock.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>