Tweak def symbol sort order

The list of EQUs at the top of the file is sorted, by type, then
value, then name.  This adds width as an additional check, so that
if you have overlapping items the widest comes first.

This is nice when you have a general entry for a block of data, and
then specific entries for some locations within the block.

SourceGen/DisasmProject.cs

@@ -1673,7 +1673,7 @@ namespace SourceGen {
 
             // Sort order:
             // - constants appear before addresses
-            // - ascending numeric value
+            // - ascending numeric value, wider items first
             // - ascending label
             ActiveDefSymbolList.Sort(delegate (DefSymbol a, DefSymbol b) {
                 // Put constants first.
@@ -1687,11 +1687,27 @@ namespace SourceGen {
                     return -1;
                 } else if (a.Value > b.Value) {
                     return 1;
+                } else if (IsWider(a, b)) {
+                    return -1;
+                } else if (IsWider(b, a)) {
+                    return 1;
                 }
                 return Asm65.Label.LABEL_COMPARER.Compare(a.Label, b.Label);
             });
         }
 
+        private bool IsWider(DefSymbol a, DefSymbol b) {
+            if (!a.HasWidth && !b.HasWidth) {
+                return false;
+            } else if (a.HasWidth && !b.HasWidth) {
+                return true;
+            } else if (!a.HasWidth && !b.HasWidth) {
+                return true;
+            } else {
+                return a.DataDescriptor.Length > b.DataDescriptor.Length;
+            }
+        }
+
         #endregion Analysis