Fix type errors for #135 (#136)

src/cones/coneops_nncone.jl

@@ -33,7 +33,7 @@ function margins(
     # we treat this as an n-times composition of R_+
     β = zero(T)
     for i in eachindex(z)
-            β += z[i] > 0 ? z[i] : 0.;
+            β += z[i] > 0 ? z[i] : zero(T);
     end
     return (α,β)
 end

src/cones/coneops_psdtrianglecone.jl

@@ -22,7 +22,7 @@ function margins(
         e = eigvals!(Hermitian(Z))  #NB: GenericLinearAlgebra doesn't support eigvals!(::Symmetric(...))
         α = minimum(e)  #minimum eigenvalue. 
     end
-    β = reduce((x,y) -> y > 0 ? x + y : x, e, init = 0.) # = sum(e[e.>0]) (no alloc)
+    β = reduce((x,y) -> y > 0 ? x + y : x, e, init = zero(T)) # = sum(e[e.>0]) (no alloc)
     (α,β)
 
 end

src/variables.jl

@@ -184,7 +184,7 @@ function _shift_to_cone_interior!(
 ) where {T}
 
     (min_margin, pos_margin) = margins(cones,z,pd)
-    target  =  max(1.,0.1 * pos_margin / degree(cones))
+    target  =  max(one(T),T(0.1) * pos_margin / degree(cones))
 
     if min_margin <= 0  #at least some component is outside its cone
         #done in two stages since otherwise (1-α) = -α for