Some cleaning in script.c

- documentation of functions translation of japanese comments
- usage of const char* instead of char* where appropriate
- removal of unused isstr() function

git-svn-id: http://eathena.googlecode.com/svn/trunk@13083 9c4de8d1-4af9-ca9b-867f-b47ac08f6c80

src/map/pc.c

@@ -5957,7 +5957,7 @@ int pc_readregistry(struct map_session_data *sd,const char *reg,int type)
 	return ( i < max ) ? atoi(sd_reg[i].value) : 0;
 }
 
-char* pc_readregistry_str(struct map_session_data *sd,char *reg,int type)
+char* pc_readregistry_str(struct map_session_data *sd,const char *reg,int type)
 {
 	struct global_reg *sd_reg;
 	int i,max;
@@ -6076,7 +6076,7 @@ int pc_setregistry(struct map_session_data *sd,const char *reg,int val,int type)
 	return 0;
 }
 
-int pc_setregistry_str(struct map_session_data *sd,char *reg,const char *val,int type)
+int pc_setregistry_str(struct map_session_data *sd,const char *reg,const char *val,int type)
 {
 	struct global_reg *sd_reg;
 	int i,*max, regmax;

src/map/pc.h

@@ -634,8 +634,8 @@ int pc_setregstr(struct map_session_data *sd,int reg,const char *str);
 #define pc_setaccountreg2str(sd,reg,val) pc_setregistry_str(sd,reg,val,1)
 int pc_readregistry(struct map_session_data*,const char*,int);
 int pc_setregistry(struct map_session_data*,const char*,int,int);
-char *pc_readregistry_str(struct map_session_data*,char*,int);
-int pc_setregistry_str(struct map_session_data*,char*,const char*,int);
+char *pc_readregistry_str(struct map_session_data*,const char*,int);
+int pc_setregistry_str(struct map_session_data*,const char*,const char*,int);
 
 int pc_addeventtimer(struct map_session_data *sd,int tick,const char *name);
 int pc_deleventtimer(struct map_session_data *sd,const char *name);