#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
*/
#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