libtracker-sparql: Don't use 'namespace' as a parameter name
This header was unusable from C++ code as 'namespace' is a reserved keyword there.
Based on a patch by Santtu Lakkala from https://bugzilla.gnome.org/show_bug.cgi?id=791510
This header was unusable from C++ code as 'namespace' is a reserved keyword there.
Based on a patch by Santtu Lakkala from https://bugzilla.gnome.org/show_bug.cgi?id=791510