Track down unsupported texture target

bug:19641517

Change-Id: Idc2e413abef5bb1438ffb3f52efb001504d3e89f
diff --git a/libs/hwui/DeferredLayerUpdater.h b/libs/hwui/DeferredLayerUpdater.h
index 38d8e4a..82f2741 100644
--- a/libs/hwui/DeferredLayerUpdater.h
+++ b/libs/hwui/DeferredLayerUpdater.h
@@ -59,6 +59,10 @@
         if (texture.get() != mSurfaceTexture.get()) {
             mNeedsGLContextAttach = needsAttach;
             mSurfaceTexture = texture;
+
+            GLenum target = texture->getCurrentTextureTarget();
+            LOG_ALWAYS_FATAL_IF(target != GL_TEXTURE_2D && target != GL_TEXTURE_EXTERNAL_OES,
+                    "set unsupported GLConsumer with target %x", target);
         }
     }