Fix bug in deref

src/codegen.cpp

@@ -119,8 +119,7 @@ namespace AST {
     codegen::StackValue DerefExpression::codegen(codegen::Builder& builder, codegen::Scope& scope) {
         auto value = this->m_expr->codegen(builder, scope);
         if (value.ty->m_kind == types::TypeKind::Pointer) {
-            auto ptr_ty = dynamic_cast<types::PointerType*>(value.ty.get());
-            auto loaded = ptr_ty->m_inner->load(builder, value.value);
+            auto loaded = value.ty->load(builder, value.value);
             return codegen::StackValue{
                 loaded.first,
                 loaded.second

test.c

@@ -10,6 +10,6 @@ int main() {
     printf("10th fibonacci number is %d!", fibonacci(10));
     char res = 0;
     char* test = &res;
-    (*test) = 15;
+    (*test) = 20;
     return res;
 }