Add and reorganize constant define includes

src/engine/pattern.h

@@ -22,7 +22,7 @@
 
 struct DivPattern {
   String name;
-  short data[256][32];
+  short data[DIV_MAX_ROWS][DIV_MAX_COLS];
 
   /**
    * copy this pattern to another.
@@ -42,7 +42,7 @@ struct DivChannelData {
   // 3: volume
   // 4-5+: effect/effect value
   // do NOT access directly unless you know what you're doing!
-  DivPattern* data[256];
+  DivPattern* data[DIV_MAX_PATTERNS];
 
   /**
    * get a pattern from this channel, or the empty pattern if not initialized.