Fixed some compilation warnings in release mode

Fixes #2219

Thanks to @keitenai, @CairoLee and @kukuasir1

src/map/intif.c

@@ -1370,7 +1370,7 @@ void intif_parse_Registers(int fd)
 	}
 
 	// have it not complain about insertion of vars before loading, and not set those vars as new or modified
-	reg_load = true;
+	pc_set_reg_load(true);
 	
 	if( RFIFOW(fd, 14) ) {
 		char key[32];
@@ -1420,7 +1420,7 @@ void intif_parse_Registers(int fd)
 		}
 	}
 
-	reg_load = false;
+	pc_set_reg_load(false);
 
 	if (flag && sd->vars_received&PRL_ACCG && sd->vars_received&PRL_ACCL && sd->vars_received&PRL_CHAR)
 		pc_reg_received(sd); //Received all registry values, execute init scripts and what-not. [Skotlex]

src/map/pc.c

@@ -67,6 +67,8 @@ struct fame_list taekwon_fame_list[MAX_FAME_LIST];
 #define MOTD_LINE_SIZE 128
 static char motd_text[MOTD_LINE_SIZE][CHAT_SIZE_MAX]; // Message of the day buffer [Valaris]
 
+bool reg_load;
+
 /**
  * Translation table from athena equip index to aegis bitmask
 */
@@ -101,6 +103,10 @@ const struct sg_data sg_info[MAX_PC_FEELHATE] = {
 		{ SG_STAR_ANGER, SG_STAR_BLESS, SG_STAR_COMFORT, "PC_FEEL_STAR", "PC_HATE_MOB_STAR", is_day_of_star }
 	};
 
+void pc_set_reg_load( bool val ){
+	reg_load = val;
+}
+
 /**
  * Item Cool Down Delay Saving
  * Struct item_cd is not a member of struct map_session_data

src/map/pc.h

@@ -746,8 +746,6 @@ extern struct eri *pc_itemgrouphealrate_ers; /// Player's Item Group Heal Rate t
  **/
 struct eri *num_reg_ers;
 struct eri *str_reg_ers;
-/* */
-bool reg_load;
 
 /* Global Expiration Timer ID */
 extern int pc_expiration_tid;
@@ -986,6 +984,7 @@ short pc_maxaspd(struct map_session_data *sd);
     )
 #endif
 
+void pc_set_reg_load(bool val);
 int pc_split_atoi(char* str, int* val, char sep, int max);
 int pc_class2idx(int class_);
 int pc_get_group_level(struct map_session_data *sd);