gdi32/tests: Fix MSVC build in icm.c.

dlls/gdi32/tests/icm.c

@@ -170,7 +170,7 @@ static void test_SetICMMode( HDC dc )
     DeleteDC( dc );
 }
 
-static CALLBACK INT enum_profiles_callbackA( LPSTR filename, LPARAM lparam )
+static INT CALLBACK enum_profiles_callbackA( LPSTR filename, LPARAM lparam )
 {
     trace("%s\n", filename);
     return 1;
@@ -191,7 +191,7 @@ static void test_EnumICMProfilesA( HDC dc )
     ok(ret == -1 || broken(ret == 0) /* nt4 */, "expected -1, got %d\n", ret);
 }
 
-static CALLBACK INT enum_profiles_callbackW( LPWSTR filename, LPARAM lparam )
+static INT CALLBACK enum_profiles_callbackW( LPWSTR filename, LPARAM lparam )
 {
     return 1;
 }