fixes issue with translator frame not getting freed

A translator frame even if it local storage so the translation path
can be freed.  This issue prevented g729 licenses from being freed up.

(closes issue #17630)
Reported by: manvirr
Patches:
      encoder_fix.diff uploaded by dvossel (license 671)
Tested by: manvirr, dvossel



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@280448 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -3185,6 +3185,9 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
 							AST_LIST_NEXT(cur, frame_list) = NULL;
 							ast_frfree(cur);
 						}
+						if (new_frame != dup) {
+							ast_frfree(new_frame);
+						}
 						cur = dup;
 					}
 				}