win32: Use the pending size during NCCALCSIZE #5

Job	Run time
Create test plan	6s
level1 / Haiku	1m 48s
level2 / Steam Linux Runtime (Sniper)	2m 53s
level2 / Ubuntu 20.04 (Intel Compiler)	6m 15s
level2 / Sony PlayStation 2	4m 59s
level2 / GDK (MSVC, x64)	3m 6s
level2 / MacOS (Framework) (x64)	7m 54s
level2 / tvOS (CMake & xcode)	2m 1s
level2 / MacOS (GNU prefix)	2m 55s
level2 / Windows (MSVC, clang-cl x64)	6m 7s
level2 / Sony PlayStation Vita (GLES w/ PVR_PSP2)	3m 16s
level2 / PowerPC64	1m 49s
level2 / iOS (CMake & xcode)	2m 24s
level2 / Windows (MSVC, ARM64)	4m 24s
level2 / Ubuntu 20.04	4m 58s
level2 / Ubuntu 20.04 (Intel oneAPI)	8m 6s
level2 / Windows (msys2, mingw32)	9m 57s
level2 / Emscripten	9m 17s
level2 / Android (CMake, lean)	3m 23s
level2 / Android (Android.mk)	4m 34s
level2 / RISC OS	1m 20s
level2 / FreeBSD	2m 44s
level2 / Windows (MSVC, ARM)	4m 14s
level2 / PowerPC	1m 48s
level2 / Android (Gradle)	2m 32s
level2 / LoongArch64	3m 10s
level2 / NetBSD	2m 55s
level2 / Windows (msys2, clang64)	6m 35s
level2 / Nintendo 3DS	1m 57s
level2 / Windows (MSVC, clang-cl x86)	5m 55s
level2 / Windows (MSVC, x64)	6m 2s
level2 / Ubuntu 22.04	4m 50s
level2 / Sony PlayStation Vita (GLES w/ pib)	3m 19s
level2 / Windows (MSVC, x86)	6m 12s
level2 / Sony PlayStation Portable	3m 49s
level2 / Windows (msys2, ucrt64)	9m 6s
level2 / Android (CMake)	4m 8s
level2 / MacOS (Framework) (arm64)	2m 18s
level2 / Windows (msys2, clang32)	8m 12s
level2 / Windows (msys2, mingw64)	8m 59s
	3h 0m 17s

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