[patch] guard against null, coffgen.c

[msnyder@sonic.net]

Unlike some of the other macros, bfd_is_common_section dereferences
the section pointer.  Since we later check it for NULL, we ought to
do so here too, before dereferencing it.

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: coffgen4.txt
URL: <https://sourceware.org/pipermail/binutils/attachments/20070726/d0596c14/attachment.txt>