Modified const and extern to always use blocks

lib/mem/alloc_windows.q

@@ -1,7 +1,3 @@
-kernel32 extern {
-	VirtualAlloc(address int, size uint, flags uint32, protection uint32) -> *any
-}
-
 alloc(length int) -> []byte {
 	x := kernel32.VirtualAlloc(0, length+8, mem.commit|mem.reserve, page.readwrite)
 
@@ -11,4 +7,10 @@ alloc(length int) -> []byte {
 
 	store(x, 8, length)
 	return x + 8
+}
+
+extern {
+	kernel32 {
+		VirtualAlloc(address int, size uint, flags uint32, protection uint32) -> *any
+	}
 }