Fix uninitialized variable in SurfaceTexture

Change-Id: Ie77cdad481fc0522ff5ea3b7e14ce94e07150793
diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
index 15a176e..2619629 100644
--- a/libs/gui/SurfaceTexture.cpp
+++ b/libs/gui/SurfaceTexture.cpp
@@ -100,6 +100,7 @@
     }
     sp<ISurfaceComposer> composer(ComposerService::getComposerService());
     mGraphicBufferAlloc = composer->createGraphicBufferAlloc();
+    mNextCrop.makeInvalid();
 }
 
 SurfaceTexture::~SurfaceTexture() {