Most cosmetic

lib/math/Grid_math_tensors.h

@@ -151,7 +151,6 @@ public:
       vstream(out._internal[i],in._internal[i]);
     }
   }
-
   friend strong_inline void permute(iVector<vtype,N> &out,const iVector<vtype,N> &in,int permutetype){
     for(int i=0;i<N;i++){
       permute(out._internal[i],in._internal[i],permutetype);
@@ -213,6 +212,8 @@ public:
 
   iMatrix(const Zero &z){ *this = zero; };
   iMatrix() =default;
+  iMatrix(scalar_type s)  { (*this) = s ;};// recurse down and hit the constructor for vector_type
+
   /*
   iMatrix(const iMatrix<vtype,N> &copyme)=default;
   iMatrix(iMatrix<vtype,N> &&copyme)=default;