Declare some function arguments as const.

Some functions, mostly in fight.c, declared variables as pointers to
const char but passed them to functions that took pointers to ordinary
char.  The strings did not actually get modified, so adding 'const' to
the function definitions removed the warnings.

rogue4/fight.c

@@ -22,8 +22,8 @@ long e_levels[] = {
 };
 
 bool roll_em(THING *thatt, THING *thdef, THING *weap, bool hurl);
-void hit(char *er, char *ee);
-void miss(char *er, char *ee);
+void hit(const char *er, const char *ee);
+void miss(const char *er, const char *ee);
 int str_plus(str_t str);
 int add_dam(str_t str);
 void thunk(THING *weap, const char *mname);
@@ -446,7 +446,7 @@ roll_em(THING *thatt, THING *thdef, THING *weap, bool hurl)
  *	The print name of a combatant
  */
 char *
-prname(char *who, bool upper)
+prname(const char *who, bool upper)
 {
     static char tbuf[MAXSTR];
 
@@ -470,7 +470,7 @@ prname(char *who, bool upper)
  *	Print a message to indicate a succesful hit
  */
 void
-hit(char *er, char *ee)
+hit(const char *er, const char *ee)
 {
     register char *s = "";
 
@@ -496,7 +496,7 @@ hit(char *er, char *ee)
  *	Print a message to indicate a poor swing
  */
 void
-miss(char *er, char *ee)
+miss(const char *er, const char *ee)
 {
     register char *s = "";
 

rogue4/misc.c

@@ -345,7 +345,7 @@ aggravate(void)
  *	"an".
  */
 char *
-vowelstr(char *str)
+vowelstr(const char *str)
 {
     switch (*str)
     {

rogue4/rogue.h

@@ -619,7 +619,7 @@ void    unconfuse(void);
 char   *unctrol(char ch);
 void    unlock_sc(void);
 void    unsee(void);
-char   *vowelstr(char *str);
+char   *vowelstr(const char *str);
 char   *xcrypt(const char *key, const char *setting);
 void    w_wait_for(WINDOW *win, char ch);
 void    wait_for(char ch);