fix : crash when sending message outside a call

- bug : sending a message outside a call lead to throw a
  std::out_of_range.

- fix : correct the condition by replacing a 'or' by 'and'

Change-Id: Ieab9a3b3a1e6c411545c13d865b6e83faa727c3a
Reviewed-by: Sébastien Blin <sebastien.blin@savoirfairelinux.com>

src/conversationmodel.cpp

@@ -458,8 +458,8 @@ ConversationModel::sendMessage(const std::string& uid, const std::string& body)
             conversation.callId.clear();
 
         if (not conversation.callId.empty()
-            or owner.callModel->getCall(conversation.callId).status != call::Status::IN_PROGRESS
-            or owner.callModel->getCall(conversation.callId).status != call::Status::PAUSED) {
+            and (owner.callModel->getCall(conversation.callId).status != call::Status::IN_PROGRESS
+                 or owner.callModel->getCall(conversation.callId).status != call::Status::PAUSED)) {
 
             owner.callModel->sendSipMessage(conversation.callId, body);