Introduced more DRD_ prefixes.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@9158 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/drd/drd_error.c b/drd/drd_error.c
index c3eb745..c06dea9 100644
--- a/drd/drd_error.c
+++ b/drd/drd_error.c
@@ -413,7 +413,7 @@
   }
 }
 
-void drd_register_error_handlers(void)
+void DRD_(register_error_handlers)(void)
 {
   // Tool error reporting.
   VG_(needs_tool_errors)(drd_tool_error_eq,