prototypes.
* eval.c: Make scm_m_mody's 3rd argument be a const char *, not a
char *. ANSI prototypes caught this.
* strorder.c: Use GUILE_PROC1 for the couple SCM_PROC1 expansions
that I missed.
* scm_validate.h: Use SCM_BOOLP for validating bools. Do not
expand macros if SCM_DOCSTRING_SNARF.
warning. (Thanks to Robert Pluim.)
* inet_aton.c (inet_aton): Reassure the compiler that the
arguments to the <ctype.h> macros are all unsigned characters, not
signed characters.
