Merge pull request #1 from simplerdev/null-file-type

fix null error when checking mime type for a file

Author: skydevht

src/ios/CDVLocalFilesystem.m

@@ -739,7 +739,8 @@ - (NSString*) mimeTypeForFileAtPath: (NSString *) path {
 
     CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)[path pathExtension], NULL);
     CFStringRef mimeType = UTTypeCopyPreferredTagWithClass (UTI, kUTTagClassMIMEType);
-    CFRelease(UTI);
+    if (UTI != NULL) // It happens when checking for a null file and the above snippet use deprecated functions
+        CFRelease(UTI);
 
     if (!mimeType) {
         return @"application/octet-stream";