[binutils-gdb] (ARI) remove trailing newline in call to error in stack.c::func_command

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 61367c61574e4d1f422e0f560672c4e63116fd7a ***

Author: Joel Brobecker <brobecker@adacore.com>
Branch: master
Commit: 61367c61574e4d1f422e0f560672c4e63116fd7a

(ARI) remove trailing newline in call to error in stack.c::func_command

gdb/ChangeLog:

        * stack.c (func_command): Remove trailing newline in call to error.