build issues on osx 10.6.8
I have python 2.6, and i'm on osx 10.6.8

when I try installing with pip or building from source (latest from git and latest stable release), i get error messages to the tune of:

```
python setup.py build
...
building 'pandas._algos' extension
creating build/temp.macosx-10.6-universal-2.6
creating build/temp.macosx-10.6-universal-2.6/pandas
creating build/temp.macosx-10.6-universal-2.6/pandas/src
gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch ppc -arch x86_64 -pipe -I/Library/Python/2.6/site-packages/numpy-2.0.0.dev_20101104-py2.6-macosx-10.6-universal.egg/numpy/core/include -I/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c pandas/src/generated.c -o build/temp.macosx-10.6-universal-2.6/pandas/src/generated.o
In file included from pandas/src/generated.c:282:
pandas/src/numpy_helper.h:47: warning: function declaration isn’t a prototype
In file included from pandas/src/generated.c:284:
pandas/src/datetime/np_datetime.h:110: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
In file included from pandas/src/generated.c:285:
pandas/src/datetime/np_datetime_strings.h:46: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
pandas/src/datetime/np_datetime_strings.h:84: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
pandas/src/generated.c: In function ‘__Pyx_GetBuffer’:
pandas/src/generated.c:61217: warning: unused variable ‘getbuffer_cobj’
pandas/src/generated.c: In function ‘__Pyx_ReleaseBuffer’:
pandas/src/generated.c:61257: warning: unused variable ‘releasebuffer_cobj’
In file included from pandas/src/generated.c:282:
pandas/src/numpy_helper.h:47: warning: function declaration isn’t a prototype
In file included from pandas/src/generated.c:284:
pandas/src/datetime/np_datetime.h:110: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
In file included from pandas/src/generated.c:285:
pandas/src/datetime/np_datetime_strings.h:46: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
pandas/src/datetime/np_datetime_strings.h:84: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
pandas/src/generated.c: In function ‘__Pyx_GetBuffer’:
pandas/src/generated.c:61217: warning: unused variable ‘getbuffer_cobj’
pandas/src/generated.c: In function ‘__Pyx_ReleaseBuffer’:
pandas/src/generated.c:61257: warning: unused variable ‘releasebuffer_cobj’
In file included from pandas/src/generated.c:282:
pandas/src/numpy_helper.h:47: warning: function declaration isn’t a prototype
In file included from pandas/src/generated.c:284:
pandas/src/datetime/np_datetime.h:110: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
In file included from pandas/src/generated.c:285:
pandas/src/datetime/np_datetime_strings.h:46: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
pandas/src/datetime/np_datetime_strings.h:84: error: expected declaration specifiers or ‘...’ before ‘NPY_CASTING’
pandas/src/generated.c: In function ‘__Pyx_GetBuffer’:
pandas/src/generated.c:61217: warning: unused variable ‘getbuffer_cobj’
pandas/src/generated.c: In function ‘__Pyx_ReleaseBuffer’:
pandas/src/generated.c:61257: warning: unused variable ‘releasebuffer_cobj’
lipo: can't open input file: /var/folders/zL/zLXn-4ccH9WTIkX1lKghn++++TI/-Tmp-//ccRz3AFI.out (No such file or directory)
error: command 'gcc-4.2' failed with exit status 1
```
