scons fix for MacOSX prior to Snow Leopard, and 32-bit compiles on SL.

This fixes "NameError: name 'wxmods' is not defined" reported by some users on the MacOSX_Build wiki page, along with a small issue in filterWarnings.
Someone on pre-SL (Leopard or Tiger) please test this change.
Fixes Issue 1890

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4843 8ced0084-cf51-0410-be5f-012b33b47a6e

SConstruct

@@ -289,8 +289,7 @@ else:
     env['HAVE_COCOA'] = 0
    
 # handling wx flags CCFLAGS should be created before
-if sys.platform == 'darwin':
-    if env['osx'] == '64cocoa':
+if sys.platform == 'darwin' and env['osx'] == '64cocoa':
     wxmods = ['adv', 'core', 'base']
 else:
     wxmods = ['aui', 'adv', 'core', 'base']

SconsTests/utils.py

@@ -5,7 +5,8 @@ import platform
 def filterWarnings(self, flags):
     return ' '.join(
         flag
-        for flag in flags
+        # flags might contain tuples, like ('-arch','i386')
+        for flag in map(lambda x:(x,'='.join(x))[isinstance(x,tuple)],flags)
         if not flag.startswith('-W')
         )