Fix old_demos; Fix when bug; Fix enum .names

examples/old_demos/demo004.odin

@@ -1,14 +1,14 @@
-#import "fmt.odin";
-#import "utf8.odin";
-#import "hash.odin";
-#import "mem.odin";
+import "core:fmt.odin";
+import "core:utf8.odin";
+import "core:hash.odin";
+import "core:mem.odin";
 
 main :: proc() {
 	{ // New Standard Library stuff
 		s := "Hello";
 		fmt.println(s,
 		            utf8.valid_string(s),
-		            hash.murmur64(cast([]byte)s));
+		            hash.murmur64(cast([]u8)s));
 
 		// utf8.odin
 		// hash.odin
@@ -20,10 +20,10 @@ main :: proc() {
 
 	{
 		arena: mem.Arena;
-		mem.init_arena_from_context(^arena, mem.megabytes(16)); // Uses default allocator
-		defer mem.free_arena(^arena);
+		mem.init_arena_from_context(&arena, mem.megabytes(16)); // Uses default allocator
+		defer mem.destroy_arena(&arena);
 
-		push_allocator mem.arena_allocator(^arena) {
+		push_allocator mem.arena_allocator(&arena) {
 			x := new(int);
 			x^ = 1337;
 
@@ -49,7 +49,7 @@ main :: proc() {
 		// You can also "push" a context
 
 		c := context; // Create copy of the allocator
-		c.allocator = mem.arena_allocator(^arena);
+		c.allocator = mem.arena_allocator(&arena);
 
 		push_context c {
 			x := new(int);