Crash when setting console command for shadow max resolution to 1

When setting the console command r.shadow.MaxResolution to a value of 1 will cause a crash.

CrashReporter: [Link Removed]

1. Open UE4
2. Hit ~ to bring up console
3. Enter "r.Shadow.MaxResolution 1"

Results: The editor will crash

Expected: The resolution can be set without a crash.

MachineId:621DFBAB44A9B51A4245D5A61065407D
EpicAccountId:7c6293d6bf1940c0bc89e1494c5ba9d7

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: InExtent.X [Link Removed] [Line: 64]

KERNELBASE + 23544 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FOutputDevice::Logf__VA() + 248 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor_Core!FDebug::AssertFailed() + 1079 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:224]
UE4Editor_Renderer!FPooledRenderTargetDesc::Create2DDesc() + 82 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\renderer\public\rendererinterface.h:64]
UE4Editor_Renderer!FSceneRenderTargets::AllocateDeferredShadingPathRenderTargets() + 884 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\renderer\private\postprocess\scenerendertargets.cpp:1307]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::Render() + 877 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:636]
UE4Editor_Renderer!RenderViewFamily_RenderThread() + 944 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\renderer\private\scenerendering.cpp:1118]
UE4Editor_Renderer!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`12'::EURCMacro_FDrawSceneCommand>::ExecuteTask() + 460 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\async\taskgraphinterfaces.h:667]
UE4Editor_Core!FTaskThread::ProcessTasks() + 3125 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\async\taskgraph.cpp:428]
UE4Editor_Core!FTaskThread::ProcessTasksUntilQuit() + 77 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\async\taskgraph.cpp:271]
UE4Editor_RenderCore!RenderingThreadMain() + 183 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\rendercore\private\renderingthread.cpp:282]
UE4Editor_RenderCore!FRenderingThread::Run() + 58 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\rendercore\private\renderingthread.cpp:385]
UE4Editor_Core!FRunnableThreadWin::Run() + 102 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:73]
UE4Editor_Core!FRunnableThreadWin::GuardedRun() + 93 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:26]
kernel32 + 5805 bytes
ntdll + 472229 bytes