gdiplus: Add missing '\n' to ok() calls, Wine traces.

dlls/gdiplus/pen.c

@@ -50,7 +50,7 @@ GpStatus WINGDIPAPI GdipCreatePen1(ARGB color, FLOAT width, GpUnit unit,
         gp_pen->gdipen = ExtCreatePen(gp_pen->style, (INT) gp_pen->width, &lb,
             0, NULL);
     } else {
-        FIXME("UnitWorld, UnitPixel only supported units");
+        FIXME("UnitWorld, UnitPixel only supported units\n");
         return NotImplemented;
     }
 

dlls/gdiplus/tests/pen.c

@@ -63,7 +63,7 @@ static void test_constructor_destructor(void)
 
     status = GdipCreatePen1((ARGB)0xffff00ff, 10.0f, UnitPixel, &pen);
     expect(Ok, status);
-    ok(pen != NULL, "Expected pen to be initialized");
+    ok(pen != NULL, "Expected pen to be initialized\n");
 
     status = GdipDeletePen(NULL);
     expect(InvalidParameter, status);