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

modules/regex/CRegEx.cpp

@@ -654,7 +654,7 @@ int RegEx::Replace(char *text, size_t textMaxLen, const char *replace, size_t re
 							 * $nn or ${nn}
 							 *   ^       ^
 							 */
-							if (*walk && *walk >= '0' && *walk <= '9')
+							if (*walk >= '0' && *walk <= '9')
 							{
 								backref = backref * 10 + *walk - '0';
 								++walk;