include malloc.h if system has it.

src/Hist.cc

@@ -10,6 +10,9 @@
  * Illinois Open Source License; see the file LICENSE.partiview for details.
  */
 
+#ifdef HAVE_MALLOC_H
+# include <malloc.h>
+#endif
 #ifndef __GNUC__
 # if HAVE_ALLOCA_H
 #  include <alloca.h>

src/geometry.h

@@ -22,6 +22,9 @@ extern "C" {
 # endif
 #endif
 
+#ifdef HAVE_MALLOC_H
+# include <malloc.h>
+#endif
 #ifndef __GNUC__
 # if HAVE_ALLOCA_H
 #  include <alloca.h>