Use begin/end macros in cogl-primitives.h
Use begin/end macros in cogl-primitives.h

Protect the people using a C++ compiler from the dark abyss of C code.

http://bugzilla.openedhand.com/show_bug.cgi?id=2049

gcampax/cogl,spatulasnout/cogl,djdeath/cogl-android,gcampax/cogl,Distrotech/cogl,djdeath/cogl,Distrotech/cogl,Distrotech/cogl,gcampax/cogl,collects/cogl,djdeath/cogl,spatulasnout/cogl,Distrotech/cogl,gcampax/cogl,djdeath/cogl-android,djdeath/cogl-android,djdeath/cogl,collects/cogl