[pass] Fix display paths for ‘pass grep’

[Allan Odgaard]

In 
http://git.zx2c4.com/password-store/commit/?id=13153cfb1aae76c93b48c4817fb4150790a64938 
both -L and a trailing slash was added to $PREFIX — the latter was an 
alternative to using -L and causes ‘find’ to output results with an 
extra slash, so the line removing $PREFIX from the ‘find’ output 
would have to also include this extra slash.

Best to just remove it again though.

--- pass (saved version)
+++ (current document)
@@ -360,7 +360,7 @@
  		passfile="${passfile##*/}"
  		printf "\e[94m%s/\e[1m%s\e[0m:\n" "$passfile_dir" "$passfile"
  		echo "$grepresults"
-	done < <(find -L "$PREFIX/" -iname '*.gpg' -print0)
+	done < <(find -L "$PREFIX" -iname '*.gpg' -print0)
  }

  cmd_insert() {