Reset Ganesh TextureDomain after use.

http://codereview.appspot.com/5877049/
http://code.google.com/p/skia/issues/detail?id=540



git-svn-id: http://skia.googlecode.com/svn/trunk@3464 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLProgram.cpp b/src/gpu/gl/GrGLProgram.cpp
index 2925213..a39b0b9 100644
--- a/src/gpu/gl/GrGLProgram.cpp
+++ b/src/gpu/gl/GrGLProgram.cpp
@@ -1383,6 +1383,7 @@
         programData->fRadial2Radius0[s] = -GR_ScalarMax;
         programData->fTextureWidth[s] = -1;
         programData->fTextureHeight[s] = -1;
+        programData->fTextureDomain[s].setEmpty();
     }
     programData->fViewMatrix = GrMatrix::InvalidMatrix();
     programData->fColor = GrColor_ILLEGAL;