fix assigning value to type

examples/12-meta.sx

@@ -9,8 +9,9 @@ Vec4 :: Vector(4,f32);
 
 main :: () {
     x : Type = f64;
-    v:f64 = 3.2;
     print("{}\n", x);
+
+    v:f64 = 3.2;
     print("{}\n", v);
 
     x = Vec4;
@@ -18,6 +19,7 @@ main :: () {
 
     x = test;
     print("{}\n", x);
+
 }
 
 // ** stdout **

src/codegen.zig

@@ -2056,6 +2056,7 @@ pub const CodeGen = struct {
                 }
                 return null;
             }
+            return self.emitErrorFmt("cannot assign non-type value to Type variable '{s}'", .{name});
         }
 
         // Union reassignment: s = .circle(3.14) or s = .none