Lend replace_line() a void

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@255 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

search.c

@@ -339,7 +339,7 @@ int replace_regexp(char *string, int create_flag)
 }
 #endif
 
-char *replace_line()
+char *replace_line(void)
 {
     char *copy, *tmp;
     int new_line_size;