avifil32: Declare some variables static

[Andrew Talbot]

Changelog:
    avifil32: Declare some variables static.

diff -urN a/dlls/avifil32/factory.c b/dlls/avifil32/factory.c
--- a/dlls/avifil32/factory.c	2006-10-25 17:33:22.000000000 +0100
+++ b/dlls/avifil32/factory.c	2007-01-28 13:01:20.000000000 +0000
@@ -40,8 +40,8 @@
 
 HMODULE AVIFILE_hModule   = NULL;
 
-BOOL    AVIFILE_bLocked   = FALSE;
-UINT    AVIFILE_uUseCount = 0;
+static BOOL    AVIFILE_bLocked;
+static UINT    AVIFILE_uUseCount;
 
 static HRESULT WINAPI IClassFactory_fnQueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj);
 static ULONG   WINAPI IClassFactory_fnAddRef(LPCLASSFACTORY iface);