spread the extern "C" { } magic pixie dust around. Python itself builds now

using a C++ compiler. Still lots and lots of errors in the modules built by
setup.py, and a bunch of warnings from g++ in the core.

Objects/unicodeobject.c

@@ -83,6 +83,11 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 */
 
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Free list for Unicode objects */
 static PyUnicodeObject *unicode_freelist;
 static int unicode_freelist_size;
@@ -7418,6 +7423,11 @@ _PyUnicode_Fini(void)
     unicode_freelist_size = 0;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
+
 /*
 Local variables:
 c-basic-offset: 4