Error when view empty file

[EvgeniyMakhmudov]

Issue Type: Bug

PR have empty file in list of files (In my example it is __init__.py file, this is normal situation). When i try to look this file and click in menu occured error. The text of popup window is

This file is either too large, of an unsupported type, or has only been renamed. Would you like to view it on GitHub?

On GH it can be viewed normally.

Extension version: 0.12.0
VS Code version: Code 1.39.0 (9df03c6d6ce97c6645c5846f6dfa2a6a7d276515, 2019-10-09T06:58:03.188Z)
OS version: Linux x64 4.18.8

System Info

Item	Value
CPUs	AMD Ryzen 5 2600 Six-Core Processor (12 x 3031)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software oop_rasterization: disabled_off protected_video_decode: unavailable_off rasterization: disabled_software skia_deferred_display_list: disabled_off skia_renderer: disabled_off surface_synchronization: enabled_on video_decode: unavailable_off viz_display_compositor: disabled_off webgl: enabled webgl2: enabled
Load (avg)	1, 1, 0
Memory (System)	15.66GB (0.86GB free)
Process Argv	--unity-launch
Screen Reader	no
VM	0%