Try to fix building with MSVC
Try to fix building with MSVC

MSVC does not support variable length arrays, so using _alloca for now.

Ident/libraqm,HOST-Oman/libraqm-cmake,HOST-Oman/libraqm,anood/libraqm,Fahad-Alsaidi/libraqm,HOST-Oman/libraqm,HOST-Oman/libraqm-cmake,anood/libraqm,Ident/libraqm,Fahad-Alsaidi/libraqm,HOST-Oman/libraqm