Don't use deleted folders during "BugRegExp" detection

CHANGELOG.md

@@ -44,6 +44,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Attempt to use "svn-buddy" inside sub-folder of a working copy ended up in exception for Subversion 1.7+ client.
 - It was possible to search for an empty keyword using "search" command.
 - The externals were shown in auto-generated commit message for `commit` command.
+- Deleted branches/tags of a project were introspected for a "bugtraq:logregexp" property resulting in `Path ... not found in ... revision.` error.
 
 ## [0.3.0] - 2016-09-08
 ### Added

src/SVNBuddy/Repository/RevisionLog/Plugin/BugsPlugin.php

@@ -171,9 +171,15 @@ protected function getLastChangedRefPath($project_path)
 	{
 		$own_nesting_level = substr_count($project_path, '/') - 1;
 
+		$where_clause = array(
+			'Path LIKE :parent_path',
+			'PathNestingLevel BETWEEN :from_level AND :to_level',
+			'RevisionDeleted IS NULL',
+		);
+
 		$sql = 'SELECT Path, RevisionLastSeen
 				FROM Paths
-				WHERE Path LIKE :parent_path AND PathNestingLevel BETWEEN :from_level AND :to_level';
+				WHERE (' . implode(') AND (', $where_clause) . ')';
 		$paths = $this->database->fetchPairs($sql, array(
 			'parent_path' => $project_path . '%',
 			'from_level' => $own_nesting_level + 1,