re PR fortran/46945 (gfortran.dg/unpack_zerosize_1.f90 FAILs with -ftree-vrp -fno-tree-ccp -fno-tree-fre)
PR fortran/46945
* trans-array.c (gfc_array_init_size): Perform stride overflow
checking and multiplication by element_size in size_type_node instead
of sizetype, return value with size_type_node type instead of
sometimes with sizetype and sometimes with gfc_array_index_type.
* gfortran.dg/pr46945.f90: New test.
From-SVN: r167871
