change cast to cast_ptr, take in ptr types

stdlib/conversions.krak

@@ -18,10 +18,10 @@ fun to_int<T>(in: T) : int {
 	}
 	return out;
 }
-fun cast<T,U>(in: T*):U* {
-    var out:U*
+fun cast_ptr<T,U>(in: T):U {
+    var out:U
         simple_passthrough(in:out:) """
-            void* out = (void*)in;
+            void* out = in;
         """
     return out
 }

tests/test_conversions.krak

@@ -7,7 +7,7 @@ fun main():int {
 
     var a = 1337
     var b = &a
-    var c = cast<int, char>(b)
+    var c = cast_ptr<int*, char*>(b)
     //var d = c + 1
     //var e = 1 + c
     println(to_int(*(c+0)))