Fix compilation with DMD v2.112.0

SMILEBASIC/VM.d

@@ -9,6 +9,7 @@ import std.uni;
 import std.utf;
 import std.conv;
 import std.stdio;
+import undead.string;
 static import std.algorithm;
 struct Trace
 {

SMILEBASIC/builtinfunctions.d

@@ -8,6 +8,7 @@ import std.stdio;
 import std.ascii;
 import std.range;
 import std.string;
+import undead.string;
 import std.algorithm;
 import otya.smilebasic.error;
 import otya.smilebasic.type;

SMILEBASIC/console.d

@@ -4,6 +4,7 @@ import derelict.sdl2.image;
 import derelict.opengl3.gl;
 import otya.smilebasic.petitcomputer;
 import std.string;
+import undead.string;
 import std.stdio;
 import std.file;
 import std.conv;

SMILEBASIC/petitcomputer.d

@@ -12,6 +12,7 @@ static import std.algorithm;
 import core.stdc.stdio;
 import core.sync.mutex;
 import core.sync.condition;
+import core.thread;
 static import core.stdc.string;
 import otya.smilebasic.sprite;
 import otya.smilebasic.error;
@@ -704,8 +705,8 @@ class PetitComputer
             return;
         }
         import std.algorithm : clamp, min, max;
-        short stickx = SDL_GameControllerGetAxis(controller, x).clamp(-short.max, short.max);
-        short sticky = SDL_GameControllerGetAxis(controller, y).clamp(-short.max, short.max);
+        short stickx = SDL_GameControllerGetAxis(controller, x).clamp(cast(short)-short.max, short.max);
+        short sticky = SDL_GameControllerGetAxis(controller, y).clamp(cast(short)-short.max, short.max);
         s.internalX = stickx / (short.max / Stick.max);
         s.internalY = -sticky / (short.max / Stick.max);
         stick(id, s);