Fix starting indices other than 0 for DrawArrays

TRAC #11495

Author:    Andrew Lewycky
Signed-off-by: Shannon Woods
Signed-off-by: Daniel Koch

git-svn-id: https://angleproject.googlecode.com/svn/trunk@52 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/geometry/VertexDataManager.cpp b/src/libGLESv2/geometry/VertexDataManager.cpp
index b154c9d..8066f69 100644
--- a/src/libGLESv2/geometry/VertexDataManager.cpp
+++ b/src/libGLESv2/geometry/VertexDataManager.cpp
@@ -51,7 +51,7 @@
 
 void VertexDataManager::ArrayTranslationHelper::translate(const FormatConverter &converter, GLsizei stride, const void *source, void *dest)
 {
-    converter.convertArray(source, stride, mCount, dest);
+    converter.convertArray(source, stride, mFirst+mCount, dest);
 }
 
 VertexDataManager::IndexedTranslationHelper::IndexedTranslationHelper(const Index *indices, GLsizei count)