completion: fix global bash variable leak on __gitcompappend

Signed-off-by: Junio C Hamano <[email protected]>

Author: marcioAlmada

contrib/completion/git-completion.bash

@@ -180,7 +180,7 @@ fi
 
 __gitcompappend ()
 {
-	local i=${#COMPREPLY[@]}
+	local x i=${#COMPREPLY[@]}
 	for x in $1; do
 		if [[ "$x" == "$3"* ]]; then
 			COMPREPLY[i++]="$2$x$4"