Properly restore the GL scissor after a GL draw functor
Bug #5781254

Change-Id: I1dc4809563a793b6b579814951d4d73b4c34bf32
diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index f2205f6..b151b20 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -325,6 +325,10 @@
     }
 }
 
+void Caches::resetScissor() {
+    mScissorX = mScissorY = mScissorWidth = mScissorHeight = 0;
+}
+
 TextureVertex* Caches::getRegionMesh() {
     // Create the mesh, 2 triangles and 4 vertices per rectangle in the region
     if (!mRegionMesh) {