PDF/fileSplit: uploaded PDF file with missing extension '.pdf' have not been...

PDF/fileSplit: uploaded PDF file with missing extension '.pdf' have not been recognized as PDF files - fixed.

extension/Source/core/Save.php

@@ -937,8 +937,15 @@ class Save {
     private function splitUpload(array $formElement, $pathFileName, $chmod, array $statusUpload) {
 
 
-        // Should the file be split and it's technically possible to split the file?
-        if (empty($formElement[FE_FILE_SPLIT]) || $statusUpload[FILES_TYPE] != MIME_TYPE_SPLIT_CAPABLE) {
+        // Should the file be split?
+        if (empty($formElement[FE_FILE_SPLIT])) {
+            return;
+        }
+
+        // Is it technically possible to split the file?
+        // BTW: the $statusUpload['type'] delivers 'octetstream' for PDF files who do not have the extension '.pdf' - therefore get mimetype again.
+        $mime = HelperFile::getMimeType($pathFileName);
+        if (false === strpos($mime, MIME_TYPE_SPLIT_CAPABLE) && $statusUpload[FILES_TYPE] != MIME_TYPE_SPLIT_CAPABLE) {
             return;
         }