add default initialization of reserved vector
Merged
requested to merge simon.praetorius/dune-common:issue/non_initialized_reservedvector into master
Summary
Fixes a warning of maybe not initialized member of ReservedVector
Details
A default initialization of a ReservedVector, i.e.
ReservedVector<double,3> vec;
vec.push_back(1.0);
vec.back() = 2.0;might result in a compiler warning about possible use of uninitialized members vec.data[0]. This can be fixed with a default constructor and default member initializers.