Remove #include <malloc.h>, causes a #error in freebsd build

plugins/checksum/checksum.c

@@ -23,7 +23,6 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include <malloc.h>
 #include <errno.h>
 #include <sys/types.h>
 #include <sys/stat.h>

src/version/version.c

@@ -23,7 +23,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <malloc.h>
 #include "../../config-win32.h"
 
 char *