[colm] colm-0.13.0.5 fails to build on IA32

[Jan Engelhardt]

[   79s] libtool: link: g++ -Wall -DPREFIX=\"/usr\" -Iinclude -DLOAD_INIT -fomit-frame-pointer -fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -g -o .libs/bootstrap1 bootstrap1-loadinit.o bootstrap1-main.o gen/bootstrap1-if1.o gen/bootstrap1-parse1.o  libprog.a ./.libs/libcolm.so
[   80s] mkdir -p gen
[   80s] ./bootstrap1 -c -o gen/parse2.c -e gen/if2.h -x gen/if2.cc colm.lm
[   80s] bootstrap1: tree.c:953: colm_tree_downref: Assertion `tree->refs > 0' failed.