fix BUG-141, crashing pa_job_manager when transforming a non-Image

BUGs

@@ -1,7 +1,6 @@
 ### Next: 146
 BUG-143: if I skip next fast enough in files_ip, it can get the warning about changes to entry list... (would have though I disabled next page until loaded)
-BUG-142: after transforming, the face data is still in the old spots, really should delete it / make it recalc
-BUG-141: can currently try to flip a video (in a highlighted group)
+BUG-142: after transforming, the face data is still in the old spots, really should delete it - any change invalidates the face match
 BUG-140: When db is restarted underneath PA, it crashes job mgr... It should just accept timeouts, and keep trying to reconnect every 2? mins
 BUG-125: when an image is highlighted, then post the contextmenu on a different image - the highlight does not move to the new image
          and the selected menu function processes the original or the new depending on the way the code works.

pa_job_manager.py

@@ -1897,6 +1897,11 @@ def JobTransformImage(job):
     amt=[jex.value for jex in job.extra if jex.name == "amt"][0]
     e=session.query(Entry).join(File).filter(Entry.id==id).first()
     PAprint( f"JobTransformImage: job={job.id}, id={id}, amt={amt}" )
+    # cant transfer non-image, but may get here if multi-select includes non-Image
+    if e.type.name != 'Image':
+        removeEntryAmendment( job, id )
+        FinishJob(job, "Cannot rotate file as it is not an Image","Failed")
+        return
 
     if amt == "fliph":
         AddLogForJob(job, f"INFO: Flipping {e.FullPathOnFS()} horizontally" )