close ftp if still active

Author: betaBison

gnss_lib_py/parsers/ephemeris.py

@@ -430,6 +430,8 @@ def retrieve_file(self, url, directory, filename, dest_filepath):
                                   + src_filepath + ' from ' + url)
 
         ftp.quit()
+        if ftp is not None: # try closing if still active
+            ftp.close()
         self.decompress_file(dest_filepath)
 
     def decompress_file(self, filepath):