sgs_SetDeltaSize [function]
void sgs_SetDeltaSize( sgs_Context* C, sgs_StkIdx diff )
Resizes the current stack frame to the [size+diff] size.
- If diff is positive, stack is null-variable-padded at the end.
- If diff is negative, the specified number of items are popped.
- If amount of items to be popped is bigger than size, function fails.