Added check if string is empty for yon_char_unite

source/libublsettings.c

@@ -440,9 +440,11 @@ char *yon_char_unite(char *source, ...){
         va_start(arglist,source);
         unite_char = va_arg(arglist,char*);
         while(unite_char){
+            if (unite_char[0]!='\0'){
                 char *temp = yon_char_append(new_char,unite_char);
                 free(new_char);
                 new_char=temp;
+            }
             unite_char = va_arg(arglist,char*);
         }
         va_end(arglist);