Possible memory leak in iOS plugin

[pavel-vhive]

Hi, I am using pytorch v0.2.2 with iOS, after profiling the app I discovered memory leak related to the PyTorchMobilePlugin

Malloc 3.98 MiB 61 < multiple > 243.05 MiB -[PyTorchMobilePlugin handleMethodCall:result:]
Malloc 1.33 MiB 43 < multiple > 57.11 MiB -[PyTorchMobilePlugin handleMethodCall:result:]

Please help me to solve this issue.