Fix VMatrices being garbage collected
Fix VMatrices being garbage collected

They will still be garbage collected if there is no reference to the SF-type, but they won't if only the reference to the gmod type is missing

Xandaros/Starfall,Jazzelhawk/Starfall,INPStarfall/Starfall,Jazzelhawk/Starfall,Xandaros/Starfall,Ingenious-Gaming/Starfall,INPStarfall/Starfall,Ingenious-Gaming/Starfall