Fix adding a submodule with a remote url

Without this, a non-path URL gets lost before the clone.
Signed-off-by: NDaniel Barkalow <barkalow@iabervon.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

git-submodule.sh

@@ -138,8 +138,8 @@ module_add()
 		# it is local
 		if base=$(get_repo_base "$repo"); then
 			repo="$base"
-			realrepo=$repo
 		fi
+		realrepo=$repo
 		;;
 	esac