Trying ken's fix for windows python
diff --git a/config.m4 b/config.m4
index 424c860..5450bbe 100644
--- a/config.m4
+++ b/config.m4
@@ -145,7 +145,7 @@
     src/core/lib/iomgr/socket_utils_linux.cc \
     src/core/lib/iomgr/socket_utils_posix.cc \
     src/core/lib/iomgr/socket_utils_uv.cc \
-    src/core/lib/iomgr/socket_utils_windows.c \
+    src/core/lib/iomgr/socket_utils_windows.cc \
     src/core/lib/iomgr/socket_windows.cc \
     src/core/lib/iomgr/tcp_client_posix.cc \
     src/core/lib/iomgr/tcp_client_uv.cc \