msdmo: Declare a function static

[Andrew Talbot]

Changelog:
    msdmo: Declare a function static.

diff -urN a/dlls/msdmo/dmoreg.c b/dlls/msdmo/dmoreg.c
--- a/dlls/msdmo/dmoreg.c	2006-10-25 17:34:06.000000000 +0100
+++ b/dlls/msdmo/dmoreg.c	2007-01-11 14:41:26.000000000 +0000
@@ -302,7 +302,7 @@
 /**************************************************************************
  *  IEnumDMO_Constructor
  */
-IEnumDMO * IEnumDMO_Constructor(
+static IEnumDMO * IEnumDMO_Constructor(
     REFGUID guidCategory,
     DWORD dwFlags,
     DWORD cInTypes,