MacOSX: fix rather dumb buglet that made it impossible to create extensions on
OSX 10.3 when using a binary distribution build on 10.4.
diff --git a/Lib/distutils/unixccompiler.py b/Lib/distutils/unixccompiler.py
index 324819d..6cd14f7 100644
--- a/Lib/distutils/unixccompiler.py
+++ b/Lib/distutils/unixccompiler.py
@@ -78,7 +78,7 @@
         try:
             index = compiler_so.index('-isysroot')
             # Strip this argument and the next one:
-            del compiler_so[index:index+1]
+            del compiler_so[index:index+2]
         except ValueError:
             pass