Minor improvement of sbrk emulation on MS-Windows.

 src/w32heap.c (malloc_after_dump, realloc_after_dump): Update the
 emulated break value only if it goes up.
 (sbrk): Add assertion that the INCREMENT argument is strictly
 zero.  Improve and correct the commentary.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index c68adfcb5b1..c22b925a1d7 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2014-06-02  Eli Zaretskii  <eliz@gnu.org>
+
+        * w32heap.c (malloc_after_dump, realloc_after_dump): Update the
+        emulated break value only if it goes up.
+        (sbrk): Add assertion that the INCREMENT argument is strictly
+        zero.  Improve and correct the commentary.
+
 2014-06-02  Paul Eggert  <eggert@cs.ucla.edu>
 
         Improve AIX-related merge from emacs-24.