winedos: Compare HRESULT value explicitly against S_OK instead of using an implicit != 0 comparison.

dlls/winedos/vga.c

diff --git a/dlls/winedos/vga.c b/dlls/winedos/vga.c
index 288f867..96cadb9 100644
--- a/dlls/winedos/vga.c
+++ b/dlls/winedos/vga.c
@@ -459,7 +459,8 @@
             lpddraw=NULL;
             return;
         }
-        if ((res=IDirectDrawPalette_SetEntries(lpddpal,0,0,256,vga_def_palette))) {
+        res=IDirectDrawPalette_SetEntries(lpddpal,0,0,256,vga_def_palette);
+        if (res != S_OK) {
             ERR("Could not set default palette entries (res = 0x%x)\n", res);
         }