don't crash if editor file was not saved (treat it as read mode) close #12

jrnl.py

@@ -404,12 +404,16 @@ if __name__ == "__main__":
         if config['editor']:
             tmpfile = os.path.join(tempfile.gettempdir(), "jrnl")
             subprocess.call(config['editor'].split() + [tmpfile])
+            if os.path.exists(tmpfile):
                 with open(tmpfile) as f:
                     raw = f.read()
                 os.remove(tmpfile)
-
+            else:
+                print('nothing saved to file')
+                raw = ''
         else:
             raw = raw_input("Compose Entry: ")
+
         if raw:
             args.text = [raw]
         else: