Minor optimization

include/spdlog/details/pattern_formatter.h

@@ -729,9 +729,15 @@ public:
 
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
+        if(padinfo_.width_) {
             scoped_pad p(msg.payload, padinfo_, dest);
             fmt_helper::append_string_view(msg.payload, dest);
         }
+        else
+        {
+            fmt_helper::append_string_view(msg.payload, dest);
+        }
+    }
 };
 
 class ch_formatter final : public flag_formatter