Fix gcc-5 compilation

Fix gcc-5 compilation

With gcc-5.0 pre-release one gets:

hppa-tdep.c: In function ‘inst_saves_gr’:
hppa-tdep.c:1406:30: error: comparison of constant ‘9’ with boolean expression is always false [-Werror=bool-compare]

I find the misplaced parentheses obvious.

gdb/ChangeLog
2015-01-16  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Fix gcc-5 compilation.
	* hppa-tdep.c (inst_saves_gr): Fix parentheses typo.