Compiler warning

Commit 7e2a18a9 must have caused this compiler warning which I now see
on the master branch with my standard release build settings:

gcc -Wall -Wmissing-prototypes -Wpointer-arith
-Wdeclaration-after-statement -Wendif-labels
-Wmissing-format-attribute -Wformat-security -fno-strict-aliasing
-fwrapv -fexcess-precision=standard -O2 -g3 -gdwarf-4 -Werror -I.
-I../../../../src/include -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
-I/usr/include/libxml2   -c -o logicalfuncs.o logicalfuncs.c -MMD -MP
-MF .deps/logicalfuncs.Po
postmaster.c: In function ‘ServerLoop’:
postmaster.c:1777:9: error: ‘now’ may be used uninitialized in this
function [-Werror=maybe-uninitialized]   (now - AbortStartTime) >= SIGKILL_CHILDREN_AFTER_SECS)        ^
cc1: all warnings being treated as errors
make[3]: *** [postmaster.o] Error 1


--
Peter Geoghegan