show meaningful error message for invalid width, resolves #74

Signed-off-by: Andreas Unterkircher <unki@netshadow.at>

1 files changed, 4 insertions, 0 deletions

diff --git a/phpfspot_img.php b/phpfspot_img.php
index 5ef76b4..bb7e93f 100644
--- a/phpfspot_img.php
+++ b/phpfspot_img.php
@@ -87,6 +87,10 @@ class PHPFSPOT_IMG {
       /* show thumbnail */
       else {
 
+         if(!$this->parent->is_valid_width($width)) {
+            $this->parent->showTextImage("Requested width ". $width ."px is not valid!");
+            return;
+         }
          /* check for an entry if we already handled this photo before. If not,
             create a thumbnail for it.
          */