A handful of changes after applying pull request #191 from

Alessandro De Laurenzis.  That pull request cleaned up the vast
majority of compiler warnings.  However, that cleanup exposed a
few additional warnings pointing to errors in the code that needed
fixing.  The code now compiles cleanly except for one warning
about redefined CAD_DIR that I have not looked into.

utils/child.c

@@ -10,9 +10,7 @@
  *************************************************************************/
 #include <stdio.h>
 #include <string.h>
-#ifndef	SYSV
 #include <sys/wait.h>
-#endif /* SYSV */
 #include <errno.h>
 
 #include "utils/utils.h"

utils/utils.h

@@ -25,6 +25,7 @@
 #include <zlib.h>
 #endif
 
+#include "utils/tech.h"
 #include "utils/magic.h"
 
 /*