The previous revision (objfiles.c:1.2) fixed backtracing in the absence of full debugging symbols for the kernel, but broke it for application programs.  This commit disables that change except when kernel debugging mode is in effect.
The previous revision (objfiles.c:1.2) fixed backtracing in the
absence of full debugging symbols for the kernel, but broke it for
application programs.  This commit disables that change except when
kernel debugging mode is in effect.

This needs to go into -2.2 as well, after a suitable burn-in period.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase