Reset all skill variables if the skill fails so certain skills can't be abused

git-svn-id: https://svn.code.sf.net/p/rathena/svn/branches/stable@910 54d463be-8e91-2dee-dedb-b68131a5f0ec

Changelog.txt

@@ -1,5 +1,7 @@
 Date	Added
 01/05
+        * Reset all skill variables if the skill fails so certain skills can't be
+          abused (such as Warp, thanks to Alex14 for pointing it out) [celest]
         * Added /mapflag/noreturn.txt for disabling butterfly wings (not fly wings)
           [celest]
         * Fixed skill_require_db reading somehow getting corrupted if weapons usable

src/map/clif.c

@@ -4315,6 +4315,11 @@ int clif_skill_fail(struct map_session_data *sd,int skill_id,int type,int btype)
 
 	fd=sd->fd;
 
+	// reset all variables [celest]
+	sd->skillx = sd->skilly = -1;
+	sd->skillid = sd->skilllv = -1;
+	sd->skillitem = sd->skillitemlv = -1;
+
 	if(type==0x4 && battle_config.display_delay_skill_fail==0){
 		return 0;
 	}