am 678886fd: am b1fc06a4: am 5e7ef948: Merge "hwui: fix possible null pointer de-refrence"

* commit '678886fde5cd779de79f8e38479aa6de82f8e755':
  hwui: fix possible null pointer de-refrence
diff --git a/libs/hwui/LayerRenderer.cpp b/libs/hwui/LayerRenderer.cpp
index df9aee5..a5fd375 100644
--- a/libs/hwui/LayerRenderer.cpp
+++ b/libs/hwui/LayerRenderer.cpp
@@ -334,8 +334,10 @@
 
 void LayerRenderer::flushLayer(Layer* layer) {
 #ifdef GL_EXT_discard_framebuffer
+    if (!layer) return;
+
     GLuint fbo = layer->getFbo();
-    if (layer && fbo) {
+    if (fbo) {
         // If possible, discard any enqueud operations on deferred
         // rendering architectures
         if (Extensions::getInstance().hasDiscardFramebuffer()) {