The gfx_deltablit parameter list is missing a comma between h and srcx:
Code:
gfx_deltablit(srcidx, x,y,w,h srcx,srcy, dsdx, dtdx, dsdy, dtdy, dsdxdy, dtdxdy[, dadx, dady, dadxdy])
As a result, when typing arguments, the IDE's inline help is misaligned, for example showing "srcy" when the user is actually typing "srcx".