Objective-C: Do not treat Objective-C files as C++ files
When both C and C++ languages are enabled, the Objective-C files should be treated as C files and not as C++ files.
Fixes: #19825 (closed)
When both C and C++ languages are enabled, the Objective-C files should be treated as C files and not as C++ files.
Fixes: #19825 (closed)