Bugfix on invalid dateformat

Segfault was thrown when no files were found with matching date

src/ttail_search_files.c

 		}
 		else if (ret == 1)
 		{
-			if(t->verbose)
-			{
-				fprintf(stderr, "Warning : unable to find \
-a valid date in '%s'\n", t->logfile_name[i]);
-			}
+			fprintf(stderr, "Warning : unable to find a valid date \
+in '%s'\n", t->logfile_name[i]);
 			free(ftm[i]);
 			ftm[i] = NULL;
 			fclose(t->logfile[i]);
 
 	*id = *off = 0;
 	valid = 0;
-	if(ttail_tm_cmp(&(ftm[0][0]), in) > 0)
-	{
-		*off = *id = 0;
-		return 0;
-	}
-	while(1)
+	while(*id < t->logfile_sz)
 	{
 		if(!ftm[*id])
 		{
 	}
 	if(!valid)
 	{
-		fprintf(stderr, "No files to scan");
+		fprintf(stderr, "No files to scan\n");
+		return 0;
 	}
 	/* the answer is somewhere in *id file */
 	*off = _ttail_from_search_from_end(t, *id, in);