TerminalShell (Windows): more variable initialization fixes #673

Job	Run time
MacOS	15m 6s
Linux	4m 0s
FreeBSD	5h 21m 16s
Linux build test (ubuntu-22.04, gcc, g++, ON)	1m 2s
spellcheck	14s
Linux build test (ubuntu-22.04, gcc, g++, OFF)	1m 12s
Win64	2m 9s
Win32	8m 45s
Linux build test (ubuntu-22.04, clang, clang++, ON)	1m 21s
Linux build test (ubuntu-22.04, clang, clang++, OFF)	1m 14s
Linux build test (ubuntu-22.04, musl-gcc, musl-g++, OFF)	53s
Linux build test (ubuntu-20.04, gcc, g++, ON)	1m 32s
Linux build test (ubuntu-20.04, gcc, g++, OFF)	1m 11s
Linux build test (ubuntu-20.04, clang, clang++, ON)	1m 15s
Linux build test (ubuntu-20.04, clang, clang++, OFF)	1m 13s
Linux build test (ubuntu-20.04, musl-gcc, musl-g++, OFF)	57s
Release	1s
	6h 3m 21s

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