Do not load image more than once

Author: radarhere

src/PIL/IptcImagePlugin.py

@@ -179,6 +179,7 @@ def load(self) -> Image.core.PixelAccess | None:
         with Image.open(o) as _im:
             _im.load()
             self.im = _im.im
+        self.tile = []
         return None