updates for 0.12/0.13

Author: rdoetjes

smac/src/smac_mt.zig

@@ -1,7 +1,7 @@
 const std = @import("std");
 const rnd_gen = std.rand.DefaultPrng;
 const heap_alloc = std.heap.page_allocator;
-const stdout = std.io.getStdOut().writer();
+var stdout = std.io.getStdOut().writer(); //windows requires var Linux and Mac OS can do with const
 
 pub fn main() !void {
     const x = 4;
@@ -12,7 +12,8 @@ pub fn main() !void {
     while (i < x) : (i += 1) {
         list[i] = std.ArrayList(u8).init(heap_alloc);
         defer list[i].deinit();
-        t[i] = try std.Thread.spawn(.{}, count_it, .{ @truncate(u32, i), &list[i] });
+        //removed @as(i32, 1) because it's not needed since 0.13 and throws an error
+        t[i] = try std.Thread.spawn(.{}, count_it, .{ i, &list[i] });
     }
 
     //we join all te threads to wait till they're done counting