Correct off-by-one error in histogram html generation

common.cpp

@@ -73,7 +73,7 @@ void show_histogram(const Caches& cc, std::string Cache::*ptr, const std::string
 				std::cout << ", " << own.first << " (" << own.second << ")";
 			i++;
 		}
-		if (i < HIST_MAX)
+		if (i <= HIST_MAX)
 			std::cout << "</div>\n";
 		else
 			std::cout << "</p></details>\n";