msacm32: Exclude unused headers

[Andrew Talbot]

Changelog:
    msacm32: Exclude unused headers.

diff -urN a/dlls/msacm32/driver.c b/dlls/msacm32/driver.c
--- a/dlls/msacm32/driver.c	2007-01-18 12:47:12.000000000 +0000
+++ b/dlls/msacm32/driver.c	2007-05-09 18:32:33.000000000 +0100
@@ -29,11 +29,9 @@
 
 #include "windef.h"
 #include "winbase.h"
-#include "winerror.h"
 #include "wingdi.h"
 #include "winuser.h"
 #include "winnls.h"
-#include "winreg.h"
 #include "mmsystem.h"
 #include "mmreg.h"
 #include "msacm.h"
diff -urN a/dlls/msacm32/msacm32_main.c b/dlls/msacm32/msacm32_main.c
--- a/dlls/msacm32/msacm32_main.c	2006-10-12 21:31:06.000000000 +0100
+++ b/dlls/msacm32/msacm32_main.c	2007-05-09 18:32:15.000000000 +0100
@@ -25,7 +25,6 @@
 
 #include "windef.h"
 #include "winbase.h"
-#include "winerror.h"
 #include "wine/debug.h"
 #include "mmsystem.h"
 #define NOBITMAP