Fix #1

Now ttail return an error if the whole date given in argument is not
matched by the format

src/ttail_init.c

@@ -422,8 +422,10 @@ format '%s'\n", c==0?"min":"max", dates[c], res->fmt);
 		}
 		else if(*date != '\0')
 		{
-			fprintf(stderr, "Leading caracters for date-%s : %s\n",\
-				c==0?"min":"max", date);
+			fprintf(stderr, "Leading caracters for date-%s : '%s' \
+is not matched in '%s'\n",\
+				c==0?"min":"max", date, dates[c]);
+			return -1;
 		}
 		res->flag |= c?TTAIL_FLAG_DATE_MAX:TTAIL_FLAG_DATE_MIN;
 	}