diffseq: avoid spurious gcc warnings

* lib/diffseq.h (IF_LINT2): Define.
(compareseq): Use it to initialize two members of "part".
This avoids two used-uninitialized warnings.

diff --git a/ChangeLog b/ChangeLog
index 04b2a6b7f1d284473ba2a687976e9b42a68a55ad..9f8d4efbe7f4d12c4e4ceae8bf3ef61ca6a695fd 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2009-11-22  Jim Meyering  <meyering@redhat.com>
+
+       diffseq: avoid spurious gcc warnings
+       * lib/diffseq.h (IF_LINT2): Define.
+       (compareseq): Use it to initialize two members of "part".
+       This avoids two used-uninitialized warnings.
+
 2009-11-21  Jim Meyering  <meyering@redhat.com>
 
        c-stack: avoid "ignoring return value of `write'" warning

diff --git a/lib/diffseq.h b/lib/diffseq.h
index 0c1723f43b127d973553f88e50ceac3fc32573d5..9c7baa6f95a928c18418e17c53aa8f3740fe47be 100644 (file)
--- a/lib/diffseq.h
+++ b/lib/diffseq.h
@@ -77,6 +77,15 @@
 # endif
 #endif
 
+/* As above, but when Code must contain one comma. */
+#ifndef IF_LINT2
+# ifdef lint
+#  define IF_LINT2(Code1, Code2) Code1, Code2
+# else
+#  define IF_LINT2(Code1, Code2) /* empty */
+# endif
+#endif
+
 /*
  * Context of comparison operation.
  */
@@ -464,7 +473,7 @@ compareseq (OFFSET xoff, OFFSET xlim, OFFSET yoff, OFFSET ylim,
       }
   else
     {
-      struct partition part;
+      struct partition part IF_LINT2 (= { .xmid = 0, .ymid = 0 });
 
       /* Find a point of correspondence in the middle of the vectors.  */
       diag (xoff, xlim, yoff, ylim, find_minimal, &part, ctxt);