fix for NSObject on Darwin

[Lars Sonchocky-Helldorf]

please move line 720 of NSObject.m after line 722 so that it reads like 
this:

      zombieMap = NSCreateMapTable(NSNonOwnedPointerMapKeyCallBacks,
        NSNonOwnedPointerMapValueCallBacks, 0);
      zombieClass = [NSZombie class];


the reason for this is that on Darwin [NSZombie class] results in calls to 
GSLogZombie() what depends on an initialized zombieMap like the following 
backtrace shows (NSMapGet chokes on a Nul table argument) here :

Breakpoint 1, 0x00115ae8 in objc_msgSend ()
(gdb) bt
#0  0x00115ae8 in objc_msgSend ()
#1  0x005b10fc in GSDebugFunctionMsg (func=0x6781f0 "NSMapGet", 
file=0x678150 "NSMapTable.m", line=345, fmt=0x692734) at NSDebug.m:633
#2  0x005dfc00 in NSMapGet (table=0x0, key=0x6971c8) at NSMapTable.m:345
#3  0x005f2524 in GSLogZombie (o=0x6971c8, sel=0x116a14) at NSObject.m:110
#4  0x005f5c00 in -[NSZombie forward::] (self=0x6971c8, _cmd=0x116ab0, 
aSel=0x116a14, argFrame=0xbfffed78) at NSObject.m:1648
#5  0x001161dc in _objc_msgForward ()
#6  0x0010ddb8 in class_initialize (cls=0x6971c8) at 
runtime/objc-class.m:2071
#7  0x0010dfd8 in _class_lookupMethodAndLoadCache (cls=0x699658, 
sel=0x1169e0) at runtime/objc-class.m:2144
#8  0x00115bd4 in objc_msgSend ()
#9  0x005f2c3c in +[NSObject initialize] (self=0x697228, _cmd=0x116a14) at 
NSObject.m:720
#10 0x005f2c3c in +[NSObject initialize] (self=Cannot access memory at 
address 0xc24bc21d
) at NSObject.m:720
#11 0x0010ddb8 in class_initialize (cls=0x697228) at 
runtime/objc-class.m:2071
#12 0x0010dcdc in class_initialize (cls=0x696748) at 
runtime/objc-class.m:2045
#13 0x0010dfd8 in _class_lookupMethodAndLoadCache (cls=0x698bd8, 
sel=0x116a08) at runtime/objc-class.m:2144
#14 0x00115bd4 in objc_msgSend ()
#15 0x00608a48 in _gnu_process_args (argc=1, argv=0xbffff3a0, 
env=0xbffff3a8) at NSProcessInfo.m:169
#16 0x00608a48 in _gnu_process_args (argc=Cannot access memory at address 
0xc24bc26d
) at NSProcessInfo.m:169
#17 0x00609008 in main (argc=1, argv=0xbffff3a0, env=0xbffff3a8) at 
NSProcessInfo.m:534
#18 0x000028f0 in _start ()
#19 0x00002720 in start ()

When I move the creation of zombieMap before "zombieClass = [NSZombie 
class];" the crash occurs later:

Program received signal EXC_BAD_ACCESS, Could not access memory.
0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
Cannot access memory at address 0x0
#1  0x005823c4 in +[NSAutoreleasePool new] (self=0x696748, _cmd=0x116a08) 
at NSAutoreleasePool.m:149
#2  0x005dee78 in NSLog (format=0x692a7c) at NSLog.m:113
#3  0x005f2544 in GSLogZombie (o=0x6971c8, sel=0x116a14) at NSObject.m:118
#4  0x005f5bcc in -[NSZombie forward::] (self=0x6971c8, _cmd=0x116ab0, 
aSel=0x116a14, argFrame=0xbfffed78) at NSObject.m:1648
#5  0x001161dc in _objc_msgForward ()
#6  0x0010ddb8 in class_initialize (cls=0x6971c8) at 
runtime/objc-class.m:2071
#7  0x0010dfd8 in _class_lookupMethodAndLoadCache (cls=0x699658, 
sel=0x1169e0) at runtime/objc-class.m:2144
#8  0x00115bd4 in objc_msgSend ()
#9  0x005f2c58 in +[NSObject initialize] (self=0x697228, _cmd=0x116a14) at 
NSObject.m:722
#10 0x005f2c58 in +[NSObject initialize] (self=Cannot access memory at 
address 0xc24bc21d
) at NSObject.m:722
#11 0x0010ddb8 in class_initialize (cls=0x697228) at 
runtime/objc-class.m:2071
#12 0x0010dcdc in class_initialize (cls=0x696748) at 
runtime/objc-class.m:2045
#13 0x0010dfd8 in _class_lookupMethodAndLoadCache (cls=0x698bd8, 
sel=0x116a08) at runtime/objc-class.m:2144
#14 0x00115bd4 in objc_msgSend ()
#15 0x00608a14 in _gnu_process_args (argc=1, argv=0xbffff3a0, 
env=0xbffff3a8) at NSProcessInfo.m:169
#16 0x00608a14 in _gnu_process_args (argc=Cannot access memory at address 
0xc24bc26d
) at NSProcessInfo.m:169
#17 0x00608fd4 in main (argc=1, argv=0xbffff3a0, env=0xbffff3a8) at 
NSProcessInfo.m:534
#18 0x000028f0 in _start ()
#19 0x00002720 in start ()

thanks, Lars