X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/46cfeac8e5e6263f64f03028b98e27c0b09575f9..34826e4ae9c6255d70c702704f5f6c3874b1e3ff:/puttymem.h

diff --git a/puttymem.h b/puttymem.h
index b529c985..6ef3f794 100644
--- a/puttymem.h
+++ b/puttymem.h
@@ -14,7 +14,7 @@
 #define smalloc(z) (mlog(__FILE__,__LINE__), safemalloc(z,1))
 #define snmalloc(z,s) (mlog(__FILE__,__LINE__), safemalloc(z,s))
 #define srealloc(y,z) (mlog(__FILE__,__LINE__), saferealloc(y,z,1))
-#define snrealloc(y,z) (mlog(__FILE__,__LINE__), saferealloc(y,z,s))
+#define snrealloc(y,z,s) (mlog(__FILE__,__LINE__), saferealloc(y,z,s))
 #define sfree(z) (mlog(__FILE__,__LINE__), safefree(z))
 void mlog(char *, int);
 #else
@@ -37,6 +37,7 @@ void safefree(void *);
  */
 #define snew(type) ((type *)snmalloc(1, sizeof(type)))
 #define snewn(n, type) ((type *)snmalloc((n), sizeof(type)))
-#define sresize(ptr, n, type) ((type *)snrealloc((ptr), (n), sizeof(type)))
+#define sresize(ptr, n, type) \
+    ((type *)snrealloc((sizeof((type *)0 == (ptr)), (ptr)), (n), sizeof(type)))
 
 #endif