output: Fix clang warnings about GNU old-style field designator

Building with clang results in some warnings about the use of GNU
old-style field designators:

-----------------------------------------------------------------------
output.c:86:2: warning: use of GNU old-style field designator extension [-Wgnu-designator]
        nextc: 0, end: 0, buf: 0, bufsize: OUTBUFSIZ, fd: 1, flags: 0
        ^~~~~~
        .nextc =
...
-----------------------------------------------------------------------

Fix the issue bu using C99 initializers instead.

This should be safe and should not introduce any compatibility problems
as it is done already in other parts of the codebase, like
src/expand.c:ccmatch() and src/parser.c::readtoken1().

Signed-off-by: Antonio Ospite <ao2@ao2.it>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
1 file changed