Update server_http.hpp

fixed issue #46

server_http.hpp

@@ -740,6 +740,14 @@ namespace SimpleWeb {
               }
             }
             if(std::stof(response->session->request->http_version) >= 1.1) {
+            float version;
+            try{
+              version = std::stof(response->session->request->http_version);
+            }catch(...){
+              std::cout<<"Cant parse version number, responding anyway";
+              version = 1.1;
+            }
+            if(version >= 1.1) {
               auto new_session = std::make_shared<Session>(this->config.max_request_streambuf_size, response->session->connection);
               this->read(new_session);
               return;