early return; fix indentation

src/check_expr.cpp

@@ -263,13 +263,14 @@ gb_internal void check_did_you_mean_scope(String const &name, Scope *scope, char
 
 gb_internal Entity *entity_from_expr(Ast *expr) {
 	expr = unparen_expr(expr);
-	if (expr != nullptr) {
-		switch (expr->kind) {
-			case Ast_Ident:
-				return expr->Ident.entity;
-			case Ast_SelectorExpr:
-				return entity_from_expr(expr->SelectorExpr.selector);
-		}
+	if (expr == nullptr) {
+		return nullptr;
+	}
+	switch (expr->kind) {
+	case Ast_Ident:
+		return expr->Ident.entity;
+	case Ast_SelectorExpr:
+		return entity_from_expr(expr->SelectorExpr.selector);
 	}
 	return nullptr;
 }