Compiling warnings on old GCC

[Richard Guo]

I came across the following compiling warnings on GCC (Red Hat 4.8.5-44)
4.8.5 with 'CFLAGS=-Og'

be-fsstubs.c: In function ‘be_lo_export’:
be-fsstubs.c:537:24: warning: ‘fd’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
  if (CloseTransientFile(fd) != 0)
                        ^
In file included from trigger.c:14:0:
trigger.c: In function ‘ExecCallTriggerFunc’:
../../../src/include/postgres.h:314:2: warning: ‘result’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
  return (Pointer) X;
  ^
trigger.c:2316:9: note: ‘result’ was declared here
  Datum  result;
         ^

I wonder if this is worth fixing, maybe by a trivial patch like
attached.

Thanks
Richard

v1-0001-Silence-old-compiler-about-Wmaybe-uninitialized.patch
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