Raise when attempting to use unimplemented classes. Check for null pointers

in more runtime functions (probably still many cases where we crash if null
pointers are passed to the API and Apple behave more tolrantly).


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@32124 72102866-910b-0410-8b05-ffd578937521

Source/NSLocale.m

@@ -179,6 +179,14 @@ static NSMutableDictionary *allLocales = nil;
 static NSDictionary *canonicalLocales = nil;
 static NSRecursiveLock *classLock = nil;
 
+#if GS_USE_ICU == 0
++ (id) allocWithZone: (NSZone*)z
+{
+  [self notImplemented: _cmd
+		reason: @"missing ICU support at configure time."];
+}
+#endif
+
 + (void) initialize
 {
   if (self == [NSLocale class])