helpers/force-make: fix retry count to be considered one less

Fixes: 530f999d

This got in as last minut code refactoring. For print purposes it counts
one less but in such case comparison has to be more than zero.

helpers/force-make

@@ -89,7 +89,7 @@ shift $((OPTIND - 1))
 
 
 while true; do
-	for ((i=retry_count-1 ; i > 0 ; i--)); do
+	for ((i=retry_count-1 ; i >= 0 ; i--)); do
 		if make -j "$jobs_count" "$@"; then
 			exit 0
 		fi