Quote all variables in numeric comparisons for safety

testing/validate-interworx.sh

@@ -509,7 +509,7 @@ if [ -n "$FIRST_WP" ]; then
                 crontab -u "$WP_USER" -l 2>/dev/null | head -10 >> "$RESULTS_FILE"
             else
                 CRON_ERR=$?
-                if [ $CRON_ERR -eq 1 ]; then
+                if [ "$CRON_ERR" -eq 1 ]; then
                     test_info "User $WP_USER has no crontab (OK - means empty)"
                 else
                     test_warn "Cannot read crontab for $WP_USER (exit code: $CRON_ERR)"
@@ -791,7 +791,7 @@ TOTAL TESTS: $TOTAL
 Completed: $(date)
 EOF
 
-if [ $FAIL -eq 0 ]; then
+if [ "$FAIL" -eq 0 ]; then
     echo -e "${GREEN}✓ ALL CRITICAL TESTS PASSED${NC}"
     echo "✓ ALL CRITICAL TESTS PASSED" >> "$RESULTS_FILE"
     echo ""