Add support for Contagion (bug 6007, r=asherkin).

core/logic_bridge.cpp

@@ -247,6 +247,8 @@ static const char *get_source_engine_name()
 	return "left4dead";
 #elif SOURCE_ENGINE == SE_NUCLEARDAWN
 	return "nucleardawn";
+#elif SOURCE_ENGINE == SE_CONTAGION
+	return "contagion";
 #elif SOURCE_ENGINE == SE_LEFT4DEAD2
 	return "left4dead2";
 #elif SOURCE_ENGINE == SE_ALIENSWARM
@@ -398,6 +400,8 @@ void do_global_plugin_loads()
 #define GAMEFIX "2.csgo"
 #elif SOURCE_ENGINE == SE_DOTA
 #define GAMEFIX "2.dota"
+#elif SOURCE_ENGINE == SE_CONTAGION
+#define GAMEFIX "2.contagion"
 #else
 #define GAMEFIX "2.ep1"
 #endif //(SOURCE_ENGINE == SE_LEFT4DEAD) || (SOURCE_ENGINE == SE_LEFT4DEAD2)

core/smn_halflife.cpp

@@ -502,6 +502,7 @@ static cell_t GuessSDKVersion(IPluginContext *pContext, const cell_t *params)
 	case SOURCE_ENGINE_LEFT4DEAD:
 		return 40;
 	case SOURCE_ENGINE_NUCLEARDAWN:
+	case SOURCE_ENGINE_CONTAGION:
 	case SOURCE_ENGINE_LEFT4DEAD2:
 		return 50;
 	case SOURCE_ENGINE_ALIENSWARM: