Add alignment requirements with USAGE_SHARED.

Change-Id: I844e37ad29a893b6e35834588a5d80e52d8bf61b
diff --git a/driver/rsdAllocation.h b/driver/rsdAllocation.h
index d506dc4..306c1b9 100644
--- a/driver/rsdAllocation.h
+++ b/driver/rsdAllocation.h
@@ -52,6 +52,7 @@
     int glFormat;
 #endif
 
+    bool useUserProvidedPtr;
     bool uploadDeferred;
 
     RsdFrameBufferObj * readBackFBO;