atl: Change storage class of dll_count to static

[Andrew Talbot]

Changelog:
    atl: Change storage class of dll_count to static.

diff -urN a/dlls/atl/registrar.c b/dlls/atl/registrar.c
--- a/dlls/atl/registrar.c	2006-10-20 18:07:56.000000000 +0100
+++ b/dlls/atl/registrar.c	2006-12-04 18:30:06.000000000 +0000
@@ -38,7 +38,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(atl);
 
-LONG dll_count = 0;
+static LONG dll_count;
 
 /**************************************************************
  * ATLRegistrar implementation