cogl-material: Set the blend equation even if blend funcs are the same
cogl-material: Set the blend equation even if blend funcs are the same

Previously it would only try to set the blend equation if the RGB and
alpha blending functions were different. However it's completely valid
to use a non-standard blending function when the functions are the
same. This patch moves the blending equation to outside the if
statement.

heysion/clutter-clone,djdeath/clutter-android,collects/clutter,spatulasnout/clutter,kerrickstaley/clutter-vala,Distrotech/clutter,djdeath/clutter,ebassi/clutter,heysion/clutter-clone,kerrickstaley/clutter-vala,collects/clutter,heysion/clutter-clone,jigpu/clutter,djdeath/clutter-multithreaded,GNOME/clutter,ebassi/clutter,jigpu/clutter,rkudiyarov/clutter_osx,djdeath/clutter,spatulasnout/clutter,rkudiyarov/clutter_osx,Distrotech/clutter,nobled/clutter,djdeath/clutter-multithreaded,collects/clutter,heysion/clutter-clone,Distrotech/clutter,spatulasnout/clutter,jigpu/clutter,kerrickstaley/clutter-vala,dlespiau/clutter,Distrotech/clutter,djdeath/clutter-multithreaded,djdeath/clutter,rkudiyarov/clutter_osx,djdeath/clutter,heysion/clutter-clone,ebassi/clutter,dlespiau/clutter,djdeath/clutter-android,jigpu/clutter,djdeath/clutter-multithreaded,spatulasnout/clutter,nobled/clutter,jigpu/clutter,GNOME/clutter,collects/clutter,GNOME/clutter,Distrotech/clutter,rkudiyarov/clutter_osx,spatulasnout/clutter,Distrotech/clutter,kerrickstaley/clutter-vala,GNOME/clutter,dlespiau/clutter,djdeath/clutter,nobled/clutter,collects/clutter,djdeath/clutter-android,djdeath/clutter,jigpu/clutter,GNOME/clutter,djdeath/clutter-android,ebassi/clutter,ebassi/clutter,djdeath/clutter-android