Bug#875461: ecflow: FTBFS when struct sigaction doesn't start with a union

[Aaron M. Ucko]

Source: ecflow
Version: 4.6.1-2
Severity: important
Tags: upstream
Justification: fails to build from source

Builds of ecflow on architectures (so far, mips and mips64el) on which
struct sigaction's first member isn't a union have been failing:

  /<<PKGBUILDDIR>>/view/src/logsvr.cc:111:35: error: braces around scalar 
initializer for type 'int'
    struct sigaction sa = { { 0, },  };
  
Please account for this possibility, perhaps by explicitly assigning
to sigaction's fields.  (I'd also recommend using the symbolic name
SIG_DFL here.)

Thanks!

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable'), (300, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, x32

Kernel: Linux 4.12.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)