Do not create core image in seek(), when load() might not run

Author: radarhere

src/PIL/TiffImagePlugin.py

@@ -1191,11 +1191,9 @@ def seek(self, frame: int) -> None:
         if not self._seek_check(frame):
             return
         self._seek(frame)
-        # Create a new core image object on second and
-        # subsequent frames in the image. Image may be
-        # different size/mode.
-        Image._decompression_bomb_check(self.size)
-        self.im = Image.core.new(self.mode, self.size)
+        # A new core image object will be needed for
+        # subsequent frames in the image.
+        self._im = None
 
     def _seek(self, frame: int) -> None:
         self.fp = self._fp
@@ -1277,6 +1275,7 @@ def load(self) -> Image.core.PixelAccess | None:
 
     def load_prepare(self) -> None:
         if self._im is None and self._will_be_transposed:
+            Image._decompression_bomb_check(self.size)
             self.im = Image.core.new(self.mode, self.size[::-1])
         ImageFile.ImageFile.load_prepare(self)