another bug with zero clifford

[RobinHankin]

> const(as.clifford(0))
Error in c_getcoeffs(L = blades(C), c = coeffs(C), m = maxyblade(C, C),  : 
  std::bad_alloc
In addition: Warning message:
In max(c(blades(C1), blades(C2), recursive = TRUE)) :
  no non-missing arguments to max; returning -Inf
> 

[RobinHankin]

possibly related:

> maxyblade(as.clifford(0),as.clifford(1))
[1] -Inf
Warning message:
In max(c(blades(C1), blades(C2), recursive = TRUE)) :
  no non-missing arguments to max; returning -Inf

[RobinHankin]

> is.homog(as.clifford(0))
[1] FALSE
Warning messages:
1: In min(g) : no non-missing arguments to min; returning Inf
2: In max(g) : no non-missing arguments to max; returning -Inf