[PATCH] diffseq: avoid compiler warning when !USE_HEURISTIC

[Daiki Ueno]

Hello,

I got a minor warning when compiling gettext, which uses the 'diffseq'
module without USE_HEURISTIC set.

  diffseq.h: In function 'diag':
  diffseq.h:189:12: warning: variable 'big_snake' set but not used 
[-Wunused-but-set-variable]
         bool big_snake = false;
              ^

Here is a patch.

>From 64d214551eb102e5acb9c971505c8b167b0d5b62 Mon Sep 17 00:00:00 2001
From: Daiki Ueno <address@hidden>
Date: Wed, 10 Dec 2014 12:38:37 +0900
Subject: [PATCH] diffseq: avoid compiler warning when !USE_HEURISTIC

* lib/diffseq.h (diag) [!USE_HEURISTIC]: Don't set the locale
variable 'big_snake'.
---
 ChangeLog     | 6 ++++++
 lib/diffseq.h | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 5fac19d..3f3eceb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2014-12-10  Daiki Ueno  <address@hidden>
+
+       diffseq: avoid compiler warning when !USE_HEURISTIC
+       * lib/diffseq.h (diag) [!USE_HEURISTIC]: Don't set the locale
+       variable 'big_snake'.
+
 2014-12-09  Paul Eggert  <address@hidden>
 
        posixtm: avoid compiler warning in a better way
diff --git a/lib/diffseq.h b/lib/diffseq.h
index 1974c36..eec5b39 100644
--- a/lib/diffseq.h
+++ b/lib/diffseq.h
@@ -186,7 +186,9 @@ diag (OFFSET xoff, OFFSET xlim, OFFSET yoff, OFFSET ylim,
   for (c = 1;; ++c)
     {
       OFFSET d;                 /* Active diagonal. */
+#ifdef USE_HEURISTIC
       bool big_snake = false;
+#endif
 
       /* Extend the top-down search by an edit step in each diagonal. */
       if (fmin > dmin)
@@ -209,8 +211,10 @@ diag (OFFSET xoff, OFFSET xlim, OFFSET yoff, OFFSET ylim,
                x < xlim && y < ylim && XREF_YREF_EQUAL (x, y);
                x++, y++)
             continue;
+#ifdef USE_HEURISTIC
           if (x - x0 > SNAKE_LIMIT)
             big_snake = true;
+#endif
           fd[d] = x;
           if (odd && bmin <= d && d <= bmax && bd[d] <= x)
             {
@@ -241,8 +245,10 @@ diag (OFFSET xoff, OFFSET xlim, OFFSET yoff, OFFSET ylim,
                xoff < x && yoff < y && XREF_YREF_EQUAL (x - 1, y - 1);
                x--, y--)
             continue;
+#ifdef USE_HEURISTIC
           if (x0 - x > SNAKE_LIMIT)
             big_snake = true;
+#endif
           bd[d] = x;
           if (!odd && fmin <= d && d <= fmax && x <= fd[d])
             {
-- 
2.1.0

Regards,
-- 
Daiki Ueno