Store float values in an union.

Single variable cannot have many values of different types. This also saves some memory, because union allocates memory just for one of its members.

include/ph7int.h

@@ -619,9 +619,9 @@ struct SHA1Context {
  * of the same value.
  */
 struct ph7_value {
-	ph7_real rVal;      /* Real value */
 	union {
 		sxi64 iVal;     /* Integer value */
+		ph7_real rVal;  /* Real value */
 		void *pOther;   /* Other values (Object, Array, Resource, Namespace, etc.) */
 	} x;
 	sxi32 iFlags;       /* Control flags (see below) */