Build: Log segment padding in addition to other stats

Points out where there is excessive padding at the end of a segment,
which can guide reducing the segment size.

No functional changes.

desktop/desktop.s

@@ -31,8 +31,8 @@
         DEFSEG SegmentLoader,      $2000, $0200
         DEFSEG SegmentDeskTopAux,  $4000, $8000
         DEFSEG SegmentDeskTopLC,   $D000, $2100
-        DEFSEG SegmentDeskTopMain, $4000, $7400
-        DEFSEG SegmentInitializer, $0800, $0900
+        DEFSEG SegmentDeskTopMain, $4000, $7300
+        DEFSEG SegmentInitializer, $0800, $0800
         DEFSEG SegmentInvoker,     $0290, $0160
 
         ;; Dynamically loaded overlays

inc/macros.inc

@@ -1408,11 +1408,17 @@ skip:
         ;; Padding to block-align this segment in the file
         .res .ident(.sprintf("k%sAlignmentPadding", .string(name)))
 
-        .out .sprintf("Segment: %20s  addr: $%04X  len: $%04X  offset: $%06X", .string(name), .ident(.sprintf("k%sAddress", .string(name))), .ident(.sprintf("k%sLength", .string(name))), .ident(.sprintf("k%sOffset", .string(name))))
-
         .org .ident(.sprintf("k%sAddress", .string(name)))
 .endmacro
 
 .macro ENDSEG name
+        .out .sprintf("Segment: %20s  addr: $%04X  len: $%04X  offset: $%06X  padding: $%04X", \
+          .string(name), \
+          .ident(.sprintf("k%sAddress", .string(name))),\
+          .ident(.sprintf("k%sLength", .string(name))),\
+          .ident(.sprintf("k%sOffset", .string(name))),\
+          .ident(.sprintf("k%sAddress", .string(name))) + .ident(.sprintf("k%sLength", .string(name))) - *\
+        )
+
         PAD_TO .ident(.sprintf("k%sAddress", .string(name))) + .ident(.sprintf("k%sLength", .string(name)))
 .endmacro