Fix some misprints and mistakes in code, part 2 (#1021)

* Fix compiler warnings about broken syntax

Revert "Fix compiler warnings about broken syntax"

This reverts commit cd0649806feaab064e93a0fbcd1f4488747f9b79.

Unbreak code

* Unbreak code

* Stop breaking code, please

* Small real unused check

* Fix "breaked" code and fix MAX_WEAPONS misprints

* Compiler break in debug mode if passing upper case strings

compiler/libpc300/sc6.c

@@ -70,7 +70,7 @@ static ucell hex2long(char *s,char **n)
     s++;
   } /* if */
 
-  assert((*s>='0' && *s<='9') || (*s>='a' && *s<='f') || (*s>='a' && *s<='f'));
+  assert((*s>='0' && *s<='9') || (*s>='a' && *s<='f') || (*s>='A' && *s<='F'));
   for ( ;; ) {
     if (*s>='0' && *s<='9')
       digit=*s-'0';