[patch/gas]: simplify frag_grow

[Steve Ellcey]

Tristan Gingold wrote:

> The 'while' loop can only be executed once.  The function 'frag_new' can
> either succeed or abort via exit (it uses xmalloc to allocate memory as
> defined by as.h).

This doesn't seem to be true.  I used the previous version of frag_grow
and put some print statements in frag_grow and I see multiple passes
through the while loop in some calls to frag_grow.  If I change the
while to an if (so that it can only be done once) and make no other
changes, my test case fails.

Steve Ellcey
sje@cup.hp.com