Failures on Ubuntu-AArch32-m32, branch gdb-8.0-branch

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	ubuntu-trusty-aarch32-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/Ubuntu-AArch32-m32/builds/626>

Commit(s) tested:
	db9a60402429d9bed9b531f7d1584860babe2c22

Author(s) (in the same order as the commits):
	Eli Zaretskii <eliz@gnu.org>

Subject:
	Avoid compiler warning in MinGW build

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Ubuntu-AArch32-m32/db/db9a60402429d9bed9b531f7d1584860babe2c22/>

*** Diff to previous build ***
============================
new FAIL: gdb.threads/interrupt-while-step-over.exp: displaced-stepping=off: iter=7: wait for stops
new FAIL: gdb.threads/interrupt-while-step-over.exp: displaced-stepping=off: iter=9: wait for stops
PASS -> FAIL: gdb.threads/pthreads.exp: check backtrace from thread 2
============================


*** Complete list of XFAILs for this builder ***

FAILURE TO OBTAIN THE COMMIT FOR THE XFAIL LIST.  PLEASE CONTACT THE BUILDBOT ADMIN.