[SDL] Stupid problem with blitting

[Pete Shinners]

Damien Damien wrote:
> to greate a simple 2D game to test a system we are developing I get SDL 
> saying (when using the draw_bmp function from the libsdl site) 
> "BlitSurface error: Surfaces must not be locked during blit"
> 
> Now, the thing is... I don't lock ANY surface ANYWHERE... So whats wrong?

i'd doublecheck the value of the surface->locked attribute. if it's not 
zero the surface sure is locked. then try to find out when and where it 
is getting set.

the code inside SDL is testing like this (inside the SDL_UpperBlit func)

	if ( src->locked || dst->locked ) {
		SDL_SetError("Surfaces must not be locked during blit");
		return(-1);
	}