event handling: fix a bug and clean house #748

Job	Run time
CMake Matrix Test. (Linux Min GCC, ubuntu-22.04, gcc-12, g++-12, 3.9, 3.19.x, ON, OFF, static)	20m 9s
CMake Matrix Test. (Linux Min GCC, ubuntu-22.04, gcc-12, g++-12, 3.9, 3.19.x, ON, OFF, shared)	13m 53s
CMake Matrix Test. (Linux Min Clang, ubuntu-22.04, clang-12, clang++-12, 3.9, 3.19.x, ON, OFF, st...	5m 0s
CMake Matrix Test. (Linux Min Clang, ubuntu-22.04, clang-12, clang++-12, 3.9, 3.19.x, ON, OFF, sh...	5m 3s
CMake Matrix Test. (MacOS Min, macos-13, clang, clang++, 3.9, 3.19.x, ON, OFF, static)	5m 0s
CMake Matrix Test. (MacOS Min, macos-13, clang, clang++, 3.9, 3.19.x, ON, OFF, shared)	6m 16s
CMake Matrix Test. (Linux Max GCC, ubuntu-24.04, gcc-14, g++-14, 3.12, 3.22.x, ON, OFF, static)	17m 53s
CMake Matrix Test. (Linux Max GCC, ubuntu-24.04, gcc-14, g++-14, 3.12, 3.22.x, ON, OFF, shared)	14m 11s
CMake Matrix Test. (Linux SIMD, ubuntu-24.04, gcc-14, g++-14, 3.12, 3.22.x, OFF, ON, static)	17m 4s
CMake Matrix Test. (Linux SIMD, ubuntu-24.04, gcc-14, g++-14, 3.12, 3.22.x, OFF, ON, shared)	13m 8s
CMake Matrix Test. (Linux Max Clang, ubuntu-24.04, clang-18, clang++-18, 3.12, 3.22.x, ON, OFF, s...	19m 4s
CMake Matrix Test. (Linux Max Clang, ubuntu-24.04, clang-18, clang++-18, 3.12, 3.22.x, ON, OFF, s...	15m 12s
CMake Matrix Test. (MacOS Max, macos-14, clang, clang++, 3.12, 3.22.x, ON, OFF, static)	3m 33s
CMake Matrix Test. (MacOS Max, macos-14, clang, clang++, 3.12, 3.22.x, ON, OFF, shared)	3m 9s
	2h 38m 35s

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