Check write_args length

Author: phansch

clippy_lints/src/explicit_write.rs

@@ -55,6 +55,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
             if let ExprKind::MethodCall(ref write_fun, _, ref write_args) =
                 unwrap_args[0].node;
             // Obtain the string that should be printed
+            if write_args.len() > 1;
             if let ExprKind::Call(_, ref output_args) = write_args[1].node;
             if let ExprKind::AddrOf(_, ref output_string_expr) = output_args[0].node;
             if let ExprKind::Array(ref string_exprs) = output_string_expr.node;