Dont match on directories with the name of the intended file. Problem identified by JJ Gray

git-svn-id: file:///home/svn/framework3/trunk@10347 4d416f70-5f16-0410-b530-b9f4589650da

lib/rex/file.rb

@@ -27,7 +27,7 @@ module FileUtils
 			path.split(::File::PATH_SEPARATOR).each { |base|
 				begin
 					path = base + ::File::SEPARATOR + file_name
-					if (::File::Stat.new(path))
+					if (::File::Stat.new(path) and not ::File.directory?(path))
 						return path
 					end
 				rescue