added std::max to avoid buffer overflow in printing (#25)

src/common.cu

@@ -652,7 +652,7 @@ testResult_t TimeTest(struct threadArgs* args, ncclDataType_t type, const char*
         setupArgs(size, type, args);
 	char rootName[100];
 	sprintf(rootName, "%6i", root);	
-	PRINT("%12li  %12li  %8s  %6s  %6s", (size_t)max(args->sendBytes, args->expectedBytes), args->nbytes / wordSize(type), typeName, opName, rootName);
+	PRINT("%12li  %12li  %8s  %6s  %6s", std::max(args->sendBytes, args->expectedBytes), args->nbytes / wordSize(type), typeName, opName, rootName);
         TESTCHECK(BenchTime(args, type, op, root, 0));
         usleep(delay_inout_place);
         TESTCHECK(BenchTime(args, type, op, root, 1));