Added include guards and C++ extern "C" {} constructs. Partial fix for #607253.

Bugfix candidate.

Mac/Include/pythonresources.h

@@ -40,6 +40,12 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 ** Resources that reside in the python executable (or, for
 ** shared ppc python, in the core dynamic library)
 */
+#ifndef Py_PYTHONRESOURCES_H
+#define Py_PYTHONRESOURCES_H
+
+#ifdef __cplusplus
+	extern "C" {
+#endif
 
 #define BASE_ID 228
 
@@ -181,3 +187,9 @@ char * PyMac_GetPythonDir(void);
 /* from macmain.c: */
 extern PyMac_PrefRecord PyMac_options;
 #endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif