BASE: Mess with strtol error handling some more.

WinCE's strtol can't actually do proper error handling because it is
lacking errno, so just check the bounds instead. If you really have
some need to pass LONG_MIN/LONG_MAX as command-line parameters then
it could always be #ifdeffed, but I'm assuming no-one cares.

base/commandLine.cpp

@@ -25,7 +25,7 @@
 
 #define FORBIDDEN_SYMBOL_EXCEPTION_exit
 
-#include <errno.h>
+#include <limits.h>
 
 #include "engines/metaengine.h"
 #include "base/commandLine.h"
@@ -266,12 +266,12 @@ void registerDefaults() {
 	if (!option) usage("Option '%s' requires an argument", argv[isLongCmd ? i : i-1]);
 
 // Use this for options which have a required integer value
+// (we don't check ERANGE because WinCE doesn't support errno, so we're stuck just rejecting LONG_MAX/LONG_MIN..)
 #define DO_OPTION_INT(shortCmd, longCmd) \
 	DO_OPTION(shortCmd, longCmd) \
 	char *endptr; \
-	errno = 0; \
-	strtol(option, &endptr, 0); \
-	if (*endptr != '\0' || errno == ERANGE) \
+	long int retval = strtol(option, &endptr, 0); \
+	if (*endptr != '\0' || retval == LONG_MAX || retval == LONG_MIN) \
 		usage("--%s: Invalid number '%s'", longCmd, option);
 
 // Use this for boolean options; this distinguishes between "-x" and "-X",