Fix the type of the heap bound variable.

lib/environ/src/environ.rs

@@ -345,7 +345,7 @@ impl<'module_environment> cranelift_wasm::FuncEnvironment for FuncEnvironment<'m
                     offset: Offset32::new(
                         offset32 + offset_of!(vmcontext::VMMemory, current_length) as i32,
                     ),
-                    global_type: self.pointer_type(),
+                    global_type: I32,
                     readonly: false,
                 });
                 (