mail: allow to read bad formed mail without notice

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@3709 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

mail.php

@@ -336,7 +336,15 @@ class mail
         }
         elseif ($prev !== "")
         {
-          list ($head, $value) = explode (": ", $prev, 2);
+          $exp = explode (": ", $prev, 2);
+          if (! array_key_exists (1, $exp))
+          {
+            //trigger_error ("Malformed mail provided: no section header",
+            //               E_USER_NOTICE);
+            $prev = "";
+            break;
+          }
+          list ($head, $value) = $exp;
           $value .= $prevCR;
           $headersArray[][$head] = $value;
           $prev = $h;