DMD backend/el.c is missing vector declarations

[Etienne via Digitalmars-d]

The el_match function on lines 2393-2615 of backend/el.c doesn't 
elaborate cases for simd. I'm not going to make a pull request because I 
don't have time to work through the lengthy process of isolating a 
particular bug, so, here they are for anyone that needs to tweak their 
own dmd:

        case TYfloat4:
        case TYdouble2:
        case TYschar16:
        case TYuchar16:
        case TYshort8:
        case TYushort8:
        case TYlong4:
        case TYulong4:
        case TYllong2:
        case TYullong2:
		if(n1->EV.Vcent.msw != n2->EV.Vcent.msw || n1->EV.Vcent.lsw != 
n2->EV.Vcent.lsw)
                        goto nomatch;
                        break;