libgui: Fix infinite recursion

One of the overloads of BufferQueueConsumer::acquireBuffer was
calling itself infinitely instead of calling the other overload.
This fixes that issue.

Bug: 19733425
Change-Id: Iac8425e1241774304a131da2fb9dec6e82922f13
diff --git a/libs/gui/BufferQueueConsumer.cpp b/libs/gui/BufferQueueConsumer.cpp
index be4bec0..821a744 100644
--- a/libs/gui/BufferQueueConsumer.cpp
+++ b/libs/gui/BufferQueueConsumer.cpp
@@ -182,7 +182,7 @@
         return BAD_VALUE;
     }
 
-    android::BufferItem item;
+    BufferItem item;
     status_t result = acquireBuffer(&item, expectedPresent);
     if (result != NO_ERROR) {
         return result;