Fix vdmcoder not being able to inverse matrix

The inverse table for the galois field was missing the last value and
thus was always set to 0, which could result in a 0-column/row in the
matrix, making it not inversible.

prrt/build.rs

@@ -82,7 +82,7 @@ fn generate_field() -> String {
     // 0 has no inverse
     inverse[0] = 0;
     inverse[1] = 1;
-    for i in 2..GF_SIZE {
+    for i in 2..=GF_SIZE {
         inverse[i] = exp[GF_SIZE - log[i] as usize];
     }
     let mut result = String::new();