Potential fix for code scanning alert no. 4: Incorrect conversion between integer types

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: drduh

handlers/form.go

@@ -1,6 +1,7 @@
 package handlers
 
 import (
+	"math"
 	"net/http"
 	"strconv"
 	"strings"
@@ -21,6 +22,9 @@ func parseFormInt(r *http.Request, field string, def int, maximum int) int {
 			if v > uint64(maximum) {
 				return maximum
 			}
+			if v > math.MaxInt {
+				return maximum
+			}
 			return int(v)
 		}
 	}