Prepare source code for amalgamation (5/6).

* include/freetype/fterrors.h: Undefine FT_KEEP_ERR_PREFIX after
using it.

ChangeLog

@@ -1,3 +1,10 @@
+2012-02-24  Vinnie Falco  <vinnie.falco@gmail.com>
+
+	Prepare source code for amalgamation (5/6).
+
+	* include/freetype/fterrors.h: Undefine FT_KEEP_ERR_PREFIX after
+	using it.
+
 2012-02-22  Vinnie Falco  <vinnie.falco@gmail.com>
 
 	Prepare source code for amalgamation (4/6).

include/freetype/fterrors.h

@@ -197,6 +197,8 @@
   /* FT_KEEP_ERR_PREFIX is needed for ftvalid.h */
 #ifndef FT_KEEP_ERR_PREFIX
 #undef FT_ERR_PREFIX
+#else
+#undef FT_KEEP_ERR_PREFIX
 #endif
 
 #endif /* __FTERRORS_H__ */