Rationalised use of #includes to be more standards-compliant.

modules/src/em_mes/C_ms_com.c

@@ -3,6 +3,9 @@
  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
+ 
+#include <stdlib.h>
+#include <string.h>
 #include <em.h>
 #include <em_mes.h>
 

modules/src/em_mes/C_ms_src.c

@@ -3,6 +3,9 @@
  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
+ 
+#include <stdlib.h>
+#include <string.h>
 #include <em.h>
 #include <em_mes.h>
 

modules/src/em_mes/C_ms_stb.c

@@ -3,6 +3,9 @@
  * (c) copyright 1990 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
+ 
+#include <stdlib.h>
+#include <string.h>
 #include <em.h>
 #include <em_mes.h>
 

modules/src/em_mes/C_ms_std.c

@@ -3,6 +3,9 @@
  * (c) copyright 1990 by the Vrije Universiteit, Amsterdam, The Netherlands.
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
+ 
+#include <stdlib.h>
+#include <string.h>
 #include <em.h>
 #include <em_mes.h>