xrEngine/Environment_editor.cpp: no need to use ref variable #5033

Job	Run time
FreeBSD Debug x86_64	6m 45s
Ubuntu Debug amd64 (gcc)	6m 5s
FreeBSD Release x86_64	8m 49s
Windows Debug x64 (msvc)	5m 49s
Ubuntu Release amd64 (gcc)	6m 37s
OpenBSD Debug x86_64	10m 44s
OpenBSD Release x86_64	9m 31s
Ubuntu Debug amd64 (clang)	6m 54s
NetBSD Debug x86_64	9m 49s
Ubuntu Release amd64 (clang)	9m 26s
Windows Debug x86 (msvc)	35m 12s
NetBSD Release x86_64	8m 38s
Alpine Debug x86_64 (gcc)	6m 42s
Windows Mixed x64 (msvc)	5m 34s
Alpine Release x86_64 (gcc)	8m 42s
Windows Mixed x86 (msvc)	5m 8s
Alpine Debug x86 (gcc)	7m 3s
Windows Release x64 (msvc)	10m 13s
Alpine Release x86 (gcc)	9m 10s
Windows Release x86 (msvc)	9m 44s
Windows Release Master Gold x64 (msvc)	8m 44s
Fedora Debug x86_64 (gcc)	16m 18s
Windows Release Master Gold x86 (msvc)	8m 37s
Fedora Release x86_64 (gcc)	14m 55s
macOS 13 Debug x86_64 (clang)	6m 27s
macOS 13 Release x86_64 (clang)	10m 1s
macOS 15 Debug arm64 (clang)	3m 58s
macOS 15 Release arm64 (clang)	5m 2s
	4h 20m 37s

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