gcc-4.2 warning fixes

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10185 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/lua/embed/embed.c

@@ -11,6 +11,7 @@ We will be using the luaL_dostring()/lua_dostring() function to call into lua
 
 */
 
+#include <stdlib.h>
 #include <stdio.h>
 
 #include <lua.h>

Examples/lua/embed/example.c

@@ -1,5 +1,7 @@
 /* File : example.c */
 
+#include <stdio.h>
+
 /* A global variable */
 double Foo = 3.0;