Provide default return values for unreachable code paths.

TRAC #11414

Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch
Author:    Andrew Lewycky

git-svn-id: https://angleproject.googlecode.com/svn/trunk@24 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/libGLESv2/geometry/VertexDataManager.cpp b/libGLESv2/geometry/VertexDataManager.cpp
index 7c2abac..b154c9d 100644
--- a/libGLESv2/geometry/VertexDataManager.cpp
+++ b/libGLESv2/geometry/VertexDataManager.cpp
@@ -263,7 +263,7 @@
       case GL_SHORT: case GL_UNSIGNED_SHORT: return sizeof(GLshort);
       case GL_FIXED: return sizeof(GLfixed);
       case GL_FLOAT: return sizeof(GLfloat);
-      default: UNREACHABLE();
+      default: UNREACHABLE(); return sizeof(GLfloat);
     }
 }