$OpenBSD$

Effectively add the c99 flag to cc

--- CMakeLists.txt.orig	Fri Feb 10 19:26:01 2017
+++ CMakeLists.txt	Thu Mar  2 18:49:14 2017
@@ -2,15 +2,7 @@
 
 project(ttyd)
 
-if(CMAKE_VERSION VERSION_LESS "3.1")
-    if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
-    else()
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
-    endif()
-else()
-    set(CMAKE_C_STANDARD 99)
-endif()
+set (CMAKE_C_FLAGS "--std=c99 ${CMAKE_C_FLAGS}")
 
 set(LIBWEBSOCKETS_MIN_VERSION 1.7.0)
 set(SOURCE_FILES src/server.c src/http.c src/protocol.c src/utils.c)
