winejoystick.drv: fix a compiler warning on clang

[Austin English]

-- 
-Austin
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diff --git a/dlls/winejoystick.drv/joystick.c b/dlls/winejoystick.drv/joystick.c
index 95d9c32..1f81353 100644
--- a/dlls/winejoystick.drv/joystick.c
+++ b/dlls/winejoystick.drv/joystick.c
@@ -286,7 +286,7 @@ static const WCHAR ini[] = {'W','i','n','e',' ','J','o','y','s','t','i','c','k',
 		/* TODO: JOYCAPS_POVCTS handling */
 		break;
 	    default:
-		WARN("Unknown axis %hhu(%hhu). Skipped.\n", jstck->axesMap[i], i);
+		WARN("Unknown axis %hhu(%u). Skipped.\n", jstck->axesMap[i], i);
 	    }
 	}
     }