dinput: Only complain for unsupported effect envelope if it really is useful.

dlls/dinput/effect_linuxinput.c

@@ -585,7 +585,8 @@ static HRESULT WINAPI LinuxInputEffectImpl_SetParameters(
             env->fade_length = 0;
             env->fade_level = 0;
         }
-        else
+        else if(peff->lpEnvelope->dwAttackTime || peff->lpEnvelope->dwAttackLevel ||
+                peff->lpEnvelope->dwFadeTime || peff->lpEnvelope->dwFadeLevel)
             WARN("Ignoring dinput envelope not supported in the linux effect\n");
     }