pake_chmod does double up directory

[Woellchen]

when calling pake_chmod like pake_chmod('', 'cache/', 0777) then it will fail
output:

chmod 777 cache/cache/
Warning: chmod(): file or directory not found in /usr/share/php/pake/pakeFunction.php:351

as you see it tries to chmod cache/cache/ instead of cache/ which will result phps chmod call to fail

we have discovered that it must relate to the following commit: d600cb1
d600cb1

[indeyets]

@Woellchen looks like it is a bit of an edge-case. what exactly do you expect to "chmod" by using this code? directory itself? I, myself, never written construct like this :)

I need to know, to write a test-case and fix it reliably.