fix crash bug with connectors

because of constructor "ConnRef(Router *router, const unsigned int id)", _srcVert and _dstVert can be NULL, and _active can be false. this constructor seems unfinished, but is used elsewhere in the code. hence the crash.

Fixed bugs:
  - https://launchpad.net/bugs/977003

(bzr r13341.1.72)

1 files changed, 11 insertions, 7 deletions

diff --git a/src/libavoid/connector.cpp b/src/libavoid/connector.cpp
index 8dcb66f2d..b8c99a48c 100644
--- a/src/libavoid/connector.cpp
+++ b/src/libavoid/connector.cpp
@@ -442,11 +442,11 @@ void ConnRef::makeActive(void)
 
 void ConnRef::makeInactive(void)
 {
-    COLA_ASSERT(_active);
-    
-    // Remove from connRefs list.
-    _router->connRefs.erase(_pos);
-    _active = false;
+    if (_active) {
+        // Remove from connRefs list.
+        _router->connRefs.erase(_pos);
+        _active = false;
+    }
 }
 
 
@@ -553,8 +553,12 @@ void ConnRef::unInitialise(void)
 
 void ConnRef::removeFromGraph(void)
 {
-    _srcVert->removeFromGraph();
-    _dstVert->removeFromGraph();
+    if (_srcVert) {
+        _srcVert->removeFromGraph();
+    }
+    if (_dstVert) {
+        _dstVert->removeFromGraph();
+    }
 }