all: fix the build

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

src/gfx2d/Sprite2D.zig

@@ -5,7 +5,7 @@ const ecs = @import("ecs");
 const Engine = @import("../engine.zig").Engine;
 const mach = @import("../main.zig");
 
-const math = @import("../math.zig");
+const math = mach.math;
 const mat = math.mat;
 const Vec2 = math.Vec2;
 const Vec3 = math.Vec3;

src/math/mat.zig

@@ -377,7 +377,7 @@ test "mat4x4_ident" {
             math.Vec4.init(1, 0, 0, 0),
             math.Vec4.init(0, 1, 0, 0),
             math.Vec4.init(0, 0, 1, 0),
-            math.Vec4.init(0, 0, 1, 1),
+            math.Vec4.init(0, 0, 0, 1),
         },
     });
 }