Clear the Geometry Shader state in Renderer11::maskedClear.

TRAC #22569

Signed-off-by: Nicolas Capens
Signed-off-by: Shannon Woods
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1920 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index 15ae633..40a6954 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -1625,6 +1625,7 @@
     mDeviceContext->IASetInputLayout(mClearIL);
     mDeviceContext->VSSetShader(mClearVS, NULL, 0);
     mDeviceContext->PSSetShader(mClearPS, NULL, 0);
+    mDeviceContext->GSSetShader(NULL, NULL, 0);
 
     // Apply vertex buffer
     static UINT stride = sizeof(d3d11::PositionDepthColorVertex);