Implements GetBufferParameteriv
TRAC #11720

Author:    Shannon Woods

git-svn-id: https://angleproject.googlecode.com/svn/trunk@151 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/Buffer.cpp b/src/libGLESv2/Buffer.cpp
index 1af905f..7e5e199 100644
--- a/src/libGLESv2/Buffer.cpp
+++ b/src/libGLESv2/Buffer.cpp
@@ -65,6 +65,8 @@
         mContents.assign(newdata, newdata + size);
     }
 
+    mUsage = usage;
+
     return copyToIdentityBuffer(0, size);
 }