chore: fix "line 43: time: unbound variable" by initializing a varible with an empty value

Correction for 7e2cb42 commit.

Author: php-coder

src/main/scripts/ci/check-build-and-verify.sh

@@ -28,7 +28,7 @@ print_status() {
 		color=33
 	fi
 
-	local time
+	local time=
 	if [ $execution_time -gt 0 ]; then
 		local mins seconds
 		mins=$[execution_time / 60]