[MacPorts] #49972: pianod: fix configure failure when nawk is installed and gawk isn't

[MacPorts]

#49972: pianod: fix configure failure when nawk is installed and gawk isn't
--------------------------+--------------------------------
 Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.3.99
 Keywords:  haspatch      |       Port:  pianod
--------------------------+--------------------------------
 This patch fixes a configure failure of pianod when nawk is installed and
 gawk is not:

 {{{
 config.status: creating config.h
 nawk: illegal statement
  input record number 1, file config.h.in
  source line number 72
 config.status: error: could not create config.h
 }}}

 This is a common problem with a variety of software that uses autotools in
 its build system, and I've been fixing this problem in other ports the
 same way. If you have no objections, I'm happy to commit it.

-- 
Ticket URL: <https://trac.macports.org/ticket/49972>
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