Fix a mistake in PR #860 (commit e1af7ce) no engines were generated e… #1171

Job	Run time
MSIS code validation (ubuntu-latest)	4s
MSIS code validation (macos-latest)	15s
XML validation	19s
C/C++ build (MSVC) (ON)	9m 48s
C/C++ build (MSVC) (OFF)	8m 3s
C/C++ build (MinGW32) (ON)	4m 49s
C/C++ build (MinGW32) (OFF)	5m 16s
C/C++ build (Linux) (ubuntu-22.04, ON, ON, OFF)	5m 12s
C/C++ build (Linux) (ubuntu-22.04, ON, OFF, OFF)	5m 53s
C/C++ build (Linux) (ubuntu-22.04, OFF, ON, OFF)	5m 57s
C/C++ build (Linux) (ubuntu-22.04, OFF, OFF, OFF)	6m 37s
C/C++ build (Linux) (ubuntu-20.04, OFF, OFF, ON, OFF)	7m 0s
C/C++ build (MacOSX) (x86_64)	8m 3s
C/C++ build (MacOSX) (arm64)	1m 38s
Code coverage	2m 20s
Build Python Module from Source	0s
Matlab S-Function (macos-latest)	7m 36s
Matlab S-Function (ubuntu-22.04)	5m 34s
Matlab S-Function (windows-latest)	9m 41s
Build Python wheels	0s
Build Windows installer	0s
Deploy Stable Release	0s
Deploy Rolling Release	0s
Deploy Documentation	0s
	1h 34m 5s

Provide feedback