db/PlaylistVector: add "noexcept"

src/db/PlaylistVector.cxx

@@ -36,7 +36,7 @@ PlaylistVector::find(const char *name) noexcept
 }
 
 bool
-PlaylistVector::UpdateOrInsert(PlaylistInfo &&pi)
+PlaylistVector::UpdateOrInsert(PlaylistInfo &&pi) noexcept
 {
 	assert(holding_db_lock());
 
@@ -53,7 +53,7 @@ PlaylistVector::UpdateOrInsert(PlaylistInfo &&pi)
 }
 
 bool
-PlaylistVector::erase(const char *name)
+PlaylistVector::erase(const char *name) noexcept
 {
 	assert(holding_db_lock());
 

src/db/PlaylistVector.hxx

@@ -45,12 +45,12 @@ public:
 	 *
 	 * @return true if the vector or one of its items was modified
 	 */
-	bool UpdateOrInsert(PlaylistInfo &&pi);
+	bool UpdateOrInsert(PlaylistInfo &&pi) noexcept;
 
 	/**
 	 * Caller must lock the #db_mutex.
 	 */
-	bool erase(const char *name);
+	bool erase(const char *name) noexcept;
 };
 
 #endif /* SONGVEC_H */