pgr_lengauerTarjanDominatorTree triggers an assertion

[cvvergara]

Problem

When the vertex does not exist, it triggers an assertion on Develop mode

To Reproduce

SELECT * FROM pgr_lengauerTarjanDominatorTree(
$$SELECT id, source, source AS target, cost, reverse_cost                                                                 
FROM edges                                                                                                              
WHERE id = 1$$ , 5);
 seq | vertex_id | idom 
-----+-----------+------
   1 |         5 |    0
(1 row)

sampledata=# SELECT * FROM pgr_lengauerTarjanDominatorTree(
$$SELECT id, source, source AS target, cost, reverse_cost                                                                 
FROM edges                                                                                                              
WHERE id = 1$$ , 5);
 seq | vertex_id | idom 
-----+-----------+------
   1 |         5 |    0
(1 row)

sampledata=# SELECT * FROM pgr_lengauerTarjanDominatorTree(
$$SELECT id, source, source AS target, cost, reverse_cost                                                                 
FROM edges                                                                                                              
WHERE id = 1$$ , 6);
ERROR:  AssertFailedException: has_vertex(vid) at /home/vicky/pgrouting/pgrouting/cvvergara/include/cpp_common/pgr_base_graph.hpp:532
*** Execution path***
[bt]/usr/lib/postgresql/15/lib/libpgrouting-3.6.so(_Z13get_backtraceB5cxx11v+0x44) [0x7fa3d8efd074]
[bt]/usr/lib/postgresql/15/lib/libpgrouting-3.6.so(_ZNK9pgrouting5graph14Pgr_base_graphIN5boost14adjacency_listINS2_4vecSES4_NS2_14bidirectionalSENS_12Basic_vertexENS_10Basic_edgeENS2_11no_propertyENS2_5listSEEES6_S7_E5get_VEl+0x56) [0x7fa3d8f23142]
[bt]/usr/lib/postgresql/15/lib/libpgrouting-3.6.so(_ZN9pgrouting9functions11Pgr_LTDTreeINS_5graph14Pgr_base_graphIN5boost14adjacency_listINS4_4vecSES6_NS4_14bidirectionalSENS_12Basic_vertexENS_10Basic_edgeENS4_11no_propertyENS4_5listSEEES8_S9_EEE11pgr_ltdtreeERSD_l+0xf5) [0x7fa3d923940b]
[bt]/usr/lib/postgresql/15/lib/libpgrouting-3.6.so(do_pgr_LTDTree+0x4c3) [0x7fa3d9237f51]
[bt]/usr/lib/postgresql/15/lib/libpgrouting-3.5.so(+0xa50dea) [0x7fa3d8250dea]
[bt]/usr/lib/postgresql/15/lib/libpgrouting-3.5.so(_pgr_lengauertarjandominatortree+0xb6) [0x7fa3d8250f82]
[bt]postgres: 15/main: vicky sampledata [local] SELECT(ExecMakeTableFunctionResult+0x3d8) [0x563a837b7088]
[bt]postgres: 15/main: vicky sampledata [local] SELECT(+0x35fd4a) [0x563a837cad4a]
[bt]postgres: 15/main: vicky sampledata [local] SELECT(standard_ExecutorRun+0x10d) [0x563a837ab9fd]
[bt]postgres: 15/main: vicky sampledata [local] SELECT(+0x3888a5) [0x563a837f38a5]
[bt]postgres: 15/main: vicky sampledata [local] SELECT(SPI_execute_plan_extended+0x53) [0x563a837f3f13]
[bt]/usr/lib/postgresql/15/lib/plpgsql.so(+0x14f50) [0x7fa3e2ef5f50]
[bt]/usr/lib/postgresql/15/lib/plpgsql.so(+0x170d3) [0x7fa3e2ef80d3]
[bt]/usr/lib/postgresql/15/lib/plpgsql.so(+0x1de91) [0x7fa3e2efee91]
[bt]/usr/lib/postgresql/15/lib/plpgsql.so(plpgsql_exec_function+0x21f) [0x7fa3e2ef49ff]
[bt]/usr/lib/postgresql/15/lib/plpgsql.so(plpgsql_call_handler+0x227) [0x7fa3e2eff8f7]

HINT:  
CONTEXT:  SQL statement "SELECT a.seq, vid, a.idom
    FROM _pgr_lengauerTarjanDominatorTree(_pgr_get_statement($1),$2) AS a"
PL/pgSQL function pgr_lengauertarjandominatortree(text,bigint) line 4 at RETURN QUERY

Expectation
The least: it should not trigger an exeption

Sample Data
The sample data of the documentation

Platform/versions

SELECT pgr_version();
 pgr_version 
-------------
 3.5.0
(1 row)