Implemented IsPlayerAlive native.

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401245

plugins/include/sdktools_functions.inc

@@ -114,6 +114,15 @@ native SlapPlayer(client, health=5, bool:sound=true);
  */
 native GetClientEyeAngles(client, Float:ang[3]);
 
+/**
+ * Returns if the client is alive or dead.
+ *
+ * @param client		Player's index.
+ * @return			True if the client is dead, false otherwise.
+ * @error				Invalid client index, client not in game, or no mod support.
+ */
+native bool:IsPlayerAlive(client);
+
 /**
  * @deprecated
  */