fix for https://github.com/maoserr/redshiftgui/issues/6

gistfile1.diff

diff --git a/src/options.c b/src/options.c
index d81d8fb..dcc085c 100644
--- a/src/options.c
+++ b/src/options.c
@@ -331,9 +331,8 @@ int opt_parse_map(char *map){
 	}
 	currstr=map;
 	for( i=0; i<cnt; ++i ){
-		currsep=strchr(currstr,',');
 		currend=strchr(currstr,';');
-		curr_map[i].elev=atof(currstr);
+		curr_map[i].elev=strtof(currstr, &currsep);
 		curr_map[i].temp=atof(++currsep);
 		if( curr_map[i].elev > prevelev ){
 			free(curr_map);