Core: Conditional compound to fix Msvc, better assert but printf based, Fix tests

build/examples/raymarcher.core

@@ -4,8 +4,8 @@ V2 :: #import "MathVec2.core"; Vec2 :: V2.Vec2
 
 Epsilon  :: 0.00001
 Screen   :  *U32
-X        :   S64
-Y        :   S64
+X        :   int
+Y        :   int
 TotalTime:   F64
 LightPos := Vec3{2,4,2}
 
@@ -143,7 +143,7 @@ WinMain :: (hInstance: HINSTANCE, hPrevInstance: HINSTANCE, lpCmdLine: LPSTR, nS
 
   requested_time_per_frame: F64 = 1.0 / 60.0
   frame_start_time := Time()
-  frame_number: S64
+  frame_number: int
   for AppIsRunning
     msg: MSG
     for PeekMessageW(&msg, window, 0, 0, PM_REMOVE) > 0