I cant figure out why there is no reaction on changes in “view3d_new” function in space_view3d.c file of blender’s source code…
I can even delete it completely, and blender still compiles without any error… In other spaces (i’v tried “space_logic”) it behave as it should. Please, guys, I really need to figure out whats wrong with that 
It is possible at that point python is taking over, have you tried to compile without python (‘Blender Headless’)?
Did you try to do a clean build? The build system might have missed to re-compile something…
I figured out that “view3d_new” function which basically creates space_view3d and regions for it is overridden by read from startup file (space subdivisions, region position etc). Even if you modify startup.blend so that view3d is not a default space, the info about its region subdivisions is still there and it overrides ‘view3d_new’ function in any case.
But i’v manage to get what i want by running some of ‘view3d_new’ functionality on user actions, like show\hide toolbar or flip header. Not very clever but at least it works ))