[fix] Don't use same variable for increment and limit

salt/common/tools/sbin/so-common

@@ -155,8 +155,8 @@ wait_for_apt() {
 			local old_text="$progress_bar_text"
 		fi
 	fi
-
-	while [[ "$retry_count" -lt "$retry_count" ]]; do
+	local count=0
+	while [[ "$count" -lt "$retry_count" ]]; do
 		if __check_apt_lock; then
 			if [ -z "$progress_callback" ]; then
 				echo "$lock_msg"
@@ -168,8 +168,8 @@ wait_for_apt() {
 			$progress_callback "$old_text"
 			return 0
 		fi
-		((retry_count++))
 		sleep "$retry_timeout"
+		((count++))
 	done
 
 	if __check_apt_lock; then