[dia] [scan-build] Undefined allocation of 0 bytes

[Hans Breuer <hans src gnome org>]

commit 5e68ffa2cdcae7f7c4f56acc8706a1c794526468
Author: Hans Breuer <hans breuer org>
Date:   Fri Oct 4 15:43:57 2013 +0200

    [scan-build] Undefined allocation of 0 bytes
    
    Call to 'alloca' has an allocation size of 0 bytes
    File: /mnt/Home/with-git/dia/objects/standard/outline.c
    Line: 371

 objects/standard/outline.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/objects/standard/outline.c b/objects/standard/outline.c
index 2ea597e..db42d5a 100644
--- a/objects/standard/outline.c
+++ b/objects/standard/outline.c
@@ -367,6 +367,11 @@ outline_draw(Outline *outline, DiaRenderer *renderer)
   for (i=0; i < outline->path->num_data; i += outline->path->data[i].header.length) {
     ++total;
   }
+  /* if there is nothing to draw exit early to avoid
+   * Undefined allocation of 0 bytes (CERT MEM04-C; CWE-131)
+   */
+  if (total < 2)
+    return;
 
   pts = g_alloca (sizeof(BezPoint)*(total));
   for (i=0; i < outline->path->num_data; i += outline->path->data[i].header.length) {