Fix - remote target: Memory access error while loading section .rom_vectors

[Peter Stephens]

This is probably not a final fix, but (bad programmer - spank, spank).  If
you initialize the 'err' variable it works OK.  This is probably why it has
been such an intermittent problem.

Index: symfile.c
===================================================================
RCS file: /cvs/src/src/gdb/symfile.c,v
retrieving revision 1.144
diff -r1.144 symfile.c
1408c1408
<         int err;
---
>         int err=0;