LA: set block size information even when a flat internal storage is used #183

Job	Run time
Setup - Linux	14s
Windows (MSVC) - MPI OFF - Debug OFF	6m 52s
Windows (MSVC) - MPI ON - Debug OFF	10m 7s
Windows (MSVC) - MPI OFF - Debug ON	3m 53s
Windows (MSVC) - MPI ON - Debug ON	4m 45s
Linux (gcc) - MPI ON - Debug ON	18m 6s
Linux (gcc) - MPI ON - Debug OFF	6m 27s
Linux (gcc) - MPI OFF - Debug ON	10m 53s
Linux (gcc) - MPI OFF - Debug OFF	4m 45s
Linux (clang) - MPI ON - Debug OFF	5m 57s
	1h 11m 59s

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