reorganization of '#if's for sellecting a type for 'Rand64' +

comments

ltests.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.h,v 2.57 2018/04/11 16:49:36 roberto Exp roberto $
+** $Id: ltests.h,v 2.58 2018/04/19 15:42:41 roberto Exp roberto $
 ** Internal Header for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -49,6 +49,10 @@
 #define LUA_USE_JUMPTABLE	0
 
 
+/* use 32-bit integers in random generator */
+#define LUA_RAND32
+
+
 /* memory-allocator control variables */
 typedef struct Memcontrol {
   unsigned long numblocks;