fix uninitialized variables in GLConsumer

mDefaultWidth, mDefaultHeight and mCurrentScallingMode are now
initialized to the same default value that BufferQueue uses.

Change-Id: I0d4da2022b06419d12745716d8ddbd48c8869953
diff --git a/libs/gui/GLConsumer.cpp b/libs/gui/GLConsumer.cpp
index f8f1241..637a403 100644
--- a/libs/gui/GLConsumer.cpp
+++ b/libs/gui/GLConsumer.cpp
@@ -82,8 +82,11 @@
         GLenum texTarget, bool useFenceSync, const sp<BufferQueue> &bufferQueue) :
     ConsumerBase(bufferQueue == 0 ? new BufferQueue(allowSynchronousMode) : bufferQueue),
     mCurrentTransform(0),
+    mCurrentScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
     mCurrentFence(Fence::NO_FENCE),
     mCurrentTimestamp(0),
+    mDefaultWidth(1),
+    mDefaultHeight(1),
     mFilteringEnabled(true),
     mTexName(tex),
     mUseFenceSync(useFenceSync),