Fix pointer to view conversion for optimized intel kernels (#153)

Bug: `modcc` was generating invalid code when generating optimized kernels.

The optimized kernels use raw pointers instead of views, and the generated code was using view semantics.

* Use appropriate `memory::copy` invocation for the optimized kernel case.

modcc/cprinter.cpp

@@ -136,7 +136,12 @@ CPrinter::CPrinter(Module &m, bool o)
     if (m.kind() == moduleKind::density) {
         text_.add_line("// add the user-supplied weights for converting from current density");
         text_.add_line("// to per-compartment current in nA");
-        text_.add_line("memory::copy(weights, weights_(0, size()));");
+        if(optimize_) {
+            text_.add_line("memory::copy(weights, view(weights_, size()));");
+        }
+        else {
+            text_.add_line("memory::copy(weights, weights_(0, size()));");
+        }
         text_.add_line();
     }