check fileSize on export video Asser

iOSClient/Networking/CCNetworking.m

@@ -838,7 +838,14 @@
                             
                             // OOOOOOK
                             dispatch_async(dispatch_get_main_queue(), ^{
-                                [self upload:metadataNet.fileName serverUrl:metadataNet.serverUrl assetLocalIdentifier:metadataNet.assetLocalIdentifier session:metadataNet.session taskStatus:metadataNet.taskStatus selector:metadataNet.selector selectorPost:metadataNet.selectorPost errorCode:metadataNet.errorCode delegate:delegate];
+                                
+                                unsigned long long fileSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:[NSString stringWithFormat:@"%@/%@", _directoryUser, metadataNet.fileName] error:nil] fileSize];
+                                if (fileSize > 0) {
+                                    [self upload:metadataNet.fileName serverUrl:metadataNet.serverUrl assetLocalIdentifier:metadataNet.assetLocalIdentifier session:metadataNet.session taskStatus:metadataNet.taskStatus selector:metadataNet.selector selectorPost:metadataNet.selectorPost errorCode:metadataNet.errorCode delegate:delegate];
+                                } else {
+                                    if ([delegate respondsToSelector:@selector(uploadFileFailure:fileID:serverUrl:selector:message:errorCode:)])
+                                        [delegate uploadFileFailure:metadataNet fileID:nil serverUrl:metadataNet.serverUrl selector:metadataNet.selector message:@"Video export failed, codec not supported" errorCode:0];
+                                }
                             });
                             
                         } else  {