pmfg: ignore target with local context

[Marko Myllynen <myllynen@xxxxxxxxxx>]

Hi,

When calling pmNewContext(3) with type PM_CONTEXT_LOCAL, name is
ignored. Allow clients using pmapi.py / pmfg to pass None as well.

---
 src/python/pcp/pmapi.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/python/pcp/pmapi.py b/src/python/pcp/pmapi.py
index e4ba79a..e696330 100644
--- a/src/python/pcp/pmapi.py
+++ b/src/python/pcp/pmapi.py
@@ -2304,6 +2304,8 @@ class fetchgroup(object):
 
         self.pmfg = c_void_p()
         self.items = []
+        if typed == c_api.PM_CONTEXT_LOCAL and target = None:
+            target = "" # Ignored
         sts = LIBPCP.pmCreateFetchGroup(byref(self.pmfg), typed, 
target.encode('utf-8'))
         if sts < 0:
             raise pmErr(sts)

Thanks,

-- 
Marko Myllynen