dcf.c:
- removed inline definition of dcf variable, which is not allowed on many c compilers.
- removed SaveNode() call using ifdef, because not all canopen devices support this feature.
Later on it should be possible to enable this for each dcf entry using objdictedit.
- fixed bug when dereferencing an dcf entry from the object dictionary.

Authors :
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Edouard TISSERANT (www.canfestival.org)
Francis DUPIN (LIVIC)
Laurent BESSARD (www.canfestival.org)