lib: cry_ordering_funptr works with const_pointers.

Adjust cry_int_compare and cry_double_compare to this change.

src/structures/structures.c

@@ -21,9 +21,9 @@
 int
 cry_int_compare(const_pointer a, const_pointer b)
 {
-	if( *cry_cast(int*, a) < *cry_cast(int*, b))
+	if( *cry_cast(const int*, a) < *cry_cast(const int*, b))
 		return -1;
-	else if(*cry_cast(int*, a) > *cry_cast(int*, b))
+	else if(*cry_cast(const int*, a) > *cry_cast(const int*, b))
 		return 1;
 		
 	return 0;
@@ -33,9 +33,9 @@ cry_int_compare(const_pointer a, const_pointer b)
 int
 cry_double_compare(const_pointer a, const_pointer b)
 {
-	if(*cry_cast(double*, a) <  *cry_cast(double*, b))
+	if(*cry_cast(const double*, a) <  *cry_cast(const double*, b))
 		return -1;
-	else if(*cry_cast(double*, a) > *cry_cast(double*, b))
+	else if(*cry_cast(const double*, a) > *cry_cast(const double*, b))
 		return 1;
 
 	return 0;