Corrected autospell bonuses (fixes #1593)

* Resolves the range check when the config is enabled not checking the proper distance between the two targets.
* Updated the item bonus documentation.
Thanks to @chriser-!

doc/item_bonus.txt

@@ -329,7 +329,8 @@ bonus2 bWeaponComaRace,r,n; 		Adds a n/100% chance to cause Coma when attacking
 | 5. AutoSpell Bonuses |
 ========================
 NOTES:
-  - For all AutoSpell bonuses, target must be within the spell's range to go off.
+  - For all AutoSpell bonuses, target does not have be within the spell's range to go off.
+  -- Enable conf/battle/battle.conf::autospell_check_range to force a range check.
   - By default, AutoSpell skills are casted on target unless it is a self or support skill (inf = 4/16).
 
 bonus3 bAutoSpell,sk,y,n;       	Adds a n/10% chance to cast skill sk of level y when attacking

src/map/skill.c

@@ -2043,7 +2043,7 @@ int skill_additional_effect(struct block_list* src, struct block_list *bl, uint1
 				}
 			}
 			if (battle_config.autospell_check_range &&
-				!battle_check_range(src, tbl, skill_get_range2(src, skill, autospl_skill_lv, true)))
+				!battle_check_range(bl, tbl, skill_get_range2(src, skill, autospl_skill_lv, true)))
 				continue;
 
 			if (skill == AS_SONICBLOW)
@@ -2172,7 +2172,7 @@ int skill_onskillusage(struct map_session_data *sd, struct block_list *bl, uint1
 			}
 		}
 		if (battle_config.autospell_check_range &&
-			!battle_check_range(&sd->bl, tbl, skill_get_range2(&sd->bl, skill, skill_lv, true)))
+			!battle_check_range(bl, tbl, skill_get_range2(&sd->bl, skill, skill_lv, true)))
 			continue;
 
 		sd->state.autocast = 1;
@@ -2383,7 +2383,7 @@ int skill_counter_additional_effect (struct block_list* src, struct block_list *
 				}
 			}
 
-			if (!battle_check_range(src, tbl, skill_get_range2(src, autospl_skill_id, autospl_skill_lv, true)) && battle_config.autospell_check_range)
+			if (!battle_check_range(bl, tbl, skill_get_range2(src, autospl_skill_id, autospl_skill_lv, true)) && battle_config.autospell_check_range)
 				continue;
 
 			dstsd->state.autocast = 1;