git-review: Make `EX_USAGE` a function-local variable

This script is going to be sourced into an interactive shell session.
Don't set unnecessary variables.

1 files changed, 2 insertions, 2 deletions

diff --git a/git-review b/git-review
index fd3f59c..fef4271 100644
--- a/git-review
+++ b/git-review
@@ -1,8 +1,8 @@
 #!/bin/sh
 
-EX_USAGE=64
-
 git-review () {
+	local EX_USAGE=64
+
 	if [ "$#" -ne 1 ]; then
 		return $EX_USAGE
 	fi