Fix #11

Not 100% sur of implementation. And the feature seems a bit useless..

src/ttail_search_files.c

 				}
 				cmpres=0;
 				ret = _ttail_file_cur_cmp(t, *id, in, &cmpres);
-				if(!ret && !ttail_permissive(t))
+				if(ret > 0 && !ttail_permissive(t))
 				{
 					ttail_strict_msg();
 					return -1;
 			{
 				break;
 			}
+			if(!ttail_permissive(t))
+			{
+				ttail_strict_msg();
+				break;
+			}
 		}
 		rewind(t->logfile[i]);
 		if(fmt_id >= 0)
 {
 	FILE *fp;
 	long cur;
+	int ret;
 	memset(tm, 0, sizeof(struct tm)*2);
 	fp = t->logfile[id];
 	if(!fp)
 		{
 			return 1;
 		}
-		if(!ttail_logline2date(t, ttail_file_getline_buf(t), tm))
+		if(!(ret = ttail_logline2date(t, ttail_file_getline_buf(t), tm)))
 		{
 			break;
 		}
 		if(!ttail_permissive(t))
 		{
-			if(t->verbose <= 0)
+			fprintf(stderr,
+				"Unable to find %s in logline",
+				ret == 1?"prefix":"date");
+			if(t->verbose > 0)
 			{
-				fprintf(stderr,
-					"Unable to find a date in logline\n");
+				fprintf(stderr, " : '%s'\n",
+					ttail_file_getline_buf(t));
 			}
 			else
 			{
-				fprintf(stderr,
-					"Unable to find a date in '%s'\n",
-					ttail_file_getline_buf(t));
+				fprintf(stderr,"\n");
 			}
 			ttail_strict_msg();
 			return -1;
 		{
 			break;
 		}
+		else if(ret > 0 && !ttail_permissive(t))
+		{
+			fprintf(stderr, "Unable to find the %s in logline",
+				ret==1?"prefix":"date");
+			if(t->verbose > 0)
+			{
+				fprintf(stderr, " : '%s'\n",
+					ttail_file_getline_buf(t));
+			}
+			else
+			{
+				fprintf(stderr, "\n");
+			}
+			ttail_strict_msg();
+			break;
+		}
 		cmpret = ttail_tm_cmp(&curtm, tm);
 		if(!ret)
 		{

src/ttail_search_std.c

 		{
 			break;
 		}
+		if(!ttail_permissive(t))
+		{
+			ttail_strict_msg();
+			break;
+		}
 	}
 	if(fmt_id < 0)
 	{
 		}
 		else if(ret > 0)
 		{
+			if(!ttail_permissive(t))
+			{
+				fprintf(stderr,
+					"Unable to find the %s in logline",
+					ret==1?"prefix":"date");
+				if(t->verbose > 0)
+				{
+					fprintf(stderr, " : '%s'\n",
+						ttail_file_getline_buf(t));
+				}
+				else
+				{
+					fprintf(stderr, "\n");
+				}
+				ttail_strict_msg();
+			}
 			continue;
 		}
 		ret = ttail_tm_cmp(&tm, &(t->date_min));