Fixing subtle bugs

crates/project/src/file.rs

@@ -35,11 +35,13 @@ impl From<&Project> for ProjectFile {
 
 impl From<ProjectFile> for Project {
     fn from(file: ProjectFile) -> Self {
-        Self {
+        let mut project = Self {
             banks: file.banks,
             sample_paths: file.sample_paths,
             tempo: file.tempo,
-        }
+        };
+        project.normalize();
+        project
     }
 }
 

crates/project/src/project.rs

@@ -282,4 +282,14 @@ impl Project {
     pub fn pattern_at_mut(&mut self, bank: usize, pattern: usize) -> &mut Pattern {
         &mut self.banks[bank].patterns[pattern]
     }
+
+    pub fn normalize(&mut self) {
+        self.banks.resize_with(MAX_BANKS, Bank::default);
+        for bank in &mut self.banks {
+            bank.patterns.resize_with(MAX_PATTERNS, Pattern::default);
+            for pattern in &mut bank.patterns {
+                pattern.steps.resize_with(MAX_STEPS, Step::default);
+            }
+        }
+    }
 }