Add -E command line switch (ignore environment variables like PYTHONHOME
and PYTHONPATH).
diff --git a/PC/getpathp.c b/PC/getpathp.c
index 760a575..f32c9d3 100644
--- a/PC/getpathp.c
+++ b/PC/getpathp.c
@@ -425,7 +425,7 @@
 	char *buf;
 	size_t bufsz;
 	char *pythonhome = Py_GetPythonHome();
-	char *envpath = getenv("PYTHONPATH");
+	char *envpath = Py_GETENV("PYTHONPATH");
 
 #ifdef MS_WIN32
 	int skiphome, skipdefault;