Dynamically allocate saw table

In debug builds, this gets stack allocated, which can cause stack
overflow. See:

https://users.rust-lang.org/t/how-do-i-use-lazy-static-to-initialize-a-large-static-array/22184

synthesizer-io-core/src/modules/saw.rs

@@ -31,9 +31,10 @@ const N_SLICES: usize = 36;
 const SLICE_BASE: f32 = -9.609300863499751;
 const SLICE_OVERLAP: f32 = 0.125;
 
+// TODO: it might be better to include this as a literal, generated by script
 lazy_static! {
-    static ref SAWTAB: [[f32; N_SAMPLES + 1]; N_SLICES] = {
-        let mut t = [[0.0; N_SAMPLES + 1]; N_SLICES];
+    static ref SAWTAB: Box<[[f32; N_SAMPLES + 1]]> = {
+        let mut t = vec![[0.0; N_SAMPLES + 1]; N_SLICES];
 
         let mut lut = [0.0; N_SAMPLES / 2];
         let slice_inc = (1.0 / SLICES_PER_OCTAVE as f32).exp2();
@@ -68,7 +69,7 @@ lazy_static! {
             n_partials_last = n_partials;
             f_0 *= 1.0 / slice_inc;
         }
-        t
+        t.into_boxed_slice()
     };
 }