Fixed experience overflow on high rates

Fixes #1014

src/map/pc.c

@@ -6499,14 +6499,14 @@ int pc_gainexp(struct map_session_data *sd, struct block_list *src, unsigned int
 
 	// Give EXP for Base Level
 	if (base_exp) {
-		sd->status.base_exp += base_exp;
+		sd->status.base_exp = u32min((uint32)((uint64)sd->status.base_exp+(uint64)base_exp),UINT32_MAX);
 		if (!pc_checkbaselevelup(sd))
 			clif_updatestatus(sd,SP_BASEEXP);
 	}
 
 	// Give EXP for Job Level
 	if (job_exp) {
-		sd->status.job_exp += job_exp;
+		sd->status.job_exp = u32min((uint32)((uint64)sd->status.job_exp+(uint64)job_exp),UINT32_MAX);
 		if (!pc_checkjoblevelup(sd))
 			clif_updatestatus(sd,SP_JOBEXP);
 	}