segfault if no GUILE_LOAD_PATH

[Bill Schottstaedt]

In the CVS guile, if you don't have GUILE_LOAD_PATH set,
you get an immediate segfault:

/home/bil/cl/ gdb ../test/bin/guile
(gdb) run
Starting program: /home/bil/test/bin/guile
[New Thread 1075184800 (LWP 29892)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1075184800 (LWP 29892)]
0x4008317f in scm_from_locale_stringn (str=0x0, len=4294967295) at strings.c:318
318         len = strlen (str);
(gdb) where
#0  0x4008317f in scm_from_locale_stringn (str=0x0, len=4294967295)
    at strings.c:318
#1  0x400831a9 in scm_from_locale_string (str=0x0) at strings.c:328
#2  0x400643e8 in scm_init_load_path () at load.c:215
#3  0x40062048 in scm_init_guile_1 (base=0xbfffe9cc) at init.c:531
#4  0x400620eb in scm_boot_guile_1 (base=0xbfffe9cc, closure=0xbfffe9d0)
    at init.c:575
#5  0x40061e13 in scm_boot_guile (argc=0, argv=0x0, main_func=0, closure=0x0)
    at init.c:393
#6  0x08048998 in main (argc=1, argv=0xbfffea64) at guile.c:74
#7  0x42015504 in __libc_start_main () from /lib/tls/libc.so.6