radeon: fix prediction for r100 inline vert/elt emits.

On r100 we emit the indices inline so we need to account
for that in the emission size.

src/mesa/drivers/dri/radeon/radeon_tcl.c

@@ -412,6 +412,7 @@ static GLuint radeonEnsureEmitSize( GLcontext * ctx , GLuint inputs )
 	space_required += vbuf;
       else
 	space_required += index + elts;
+      space_required += VB->Primitive[i].count * 3;
       space_required += AOS_BUFSZ(nr_aos);
     }
     space_required += SCISSOR_BUFSZ;