parser.yy: allow postevents in function arguments in general (issue 5339043)

[pkx166h]

Patch fails to apply to current master

--snip--

address@hidden:~/lilypond-git$ patch -p1 <
../Desktop/issue5339043_1.diff
patching file lily/parser.yy
Hunk #1 succeeded at 426 (offset -38 lines).
Hunk #2 succeeded at 460 (offset -46 lines).
Hunk #3 succeeded at 1221 with fuzz 2 (offset -56 lines).
Hunk #4 FAILED at 1305.
Hunk #5 FAILED at 1416.
Hunk #6 FAILED at 1476.
Hunk #7 FAILED at 2018.
Hunk #8 succeeded at 2158 (offset -166 lines).
4 out of 8 hunks FAILED -- saving rejects to file lily/parser.yy.rej


James

http://codereview.appspot.com/5339043/