ddraw: Remove a superfluous semicolon

[Andrew Talbot]

Changelog:
    ddraw: Remove a superfluous semicolon.

diff --git a/dlls/ddraw/ddraw.c b/dlls/ddraw/ddraw.c
index 0589648..919d995 100644
--- a/dlls/ddraw/ddraw.c
+++ b/dlls/ddraw/ddraw.c
@@ -590,7 +590,7 @@ IDirectDrawImpl_SetDisplayModeNoOverride(IDirectDraw7 *iface,
     {
         case WINED3DERR_NOTAVAILABLE:       return DDERR_UNSUPPORTED;
         default:                            return hr;
-    };
+    }
 }
 
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