NSWorkspace bug

[Enrico Sersale]

After the last changes, calling NSWorkspace's
[getInfoForFile:application:type:], crashes the app.

#0  0x40593fb1 in __kill () from /lib/libc.so.6
#1  0x405352eb in raise (sig=6) at signals.c:65
#2  0x40595532 in abort () at ../sysdeps/generic/abort.c:88
#3  0x400b7d3b in _NSAppKitUncaughtExceptionHandler (exception=0x859c6a0)
    at NSApplication.m:133
#4  0x403d8602 in -[NSException raise] (self=0x859c6a0, _cmd=0x404b3c10)
    at NSException.m:164
#5  0x403d8304 in +[NSException raise:format:arguments:] (self=0x404b3b80,
    _cmd=0x404b3bf8, name=0x819be78, format=0x404bb418,
argList=0xbfffe2cc)
    at NSException.m:129
#6  0x403d8247 in +[NSException raise:format:] (self=0x404b3b80,
    _cmd=0x404bac18, name=0x819be78, format=0x404bb418) at
NSException.m:115
#7  0x403f69fe in -[NSObject doesNotRecognizeSelector:] (self=0x402d12c0,
    _cmd=0x404bac50, aSelector=0x402d1e50) at NSObject.m:810
#8  0x403f6b71 in -[NSObject forwardInvocation:] (self=0x402d12c0,
    _cmd=0x8124a88, anInvocation=0x859c178) at NSObject.m:827
#9  0x404503ba in GSInvocationCallback (callback_data=0x404d2a60,
    args=0xbfffe414) at GSFFCallInvocation.m:863
#10 0x40506ab9 in __vacall_r () at eval.c:41
#11 0x401dfb68 in -[NSWorkspace(GNUstep) getBestIconForExtension:] (
    self=0x83514b0, _cmd=0x402d17e0, ext=0x0) at NSWorkspace.m:1023
#12 0x401de384 in -[NSWorkspace getInfoForFile:application:type:] (
    self=0x83514b0, _cmd=0x80f6c10, fullPath=0x822cd68,
appName=0xbfffe598,
    type=0xbfffe594) at NSWorkspace.m:551
#13 0x805a5ce in -[IconViewsIcon initForPaths:inContainer:]
(self=0x859bbb8,
    _cmd=0x80fcff8, fpaths=0x822cd20, acontainer=0x858ff48)
    at IconViewsIcon.m:82
...
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