Check whether Command Args are already set up before doing so.

Could already be set up e.g. if a client application is using UNO
separately, in addition to LOK.

Change-Id: I50c3230b6f2456360273902a308c303576baac10

desktop/source/lib/init.cxx

@@ -577,7 +577,14 @@ static int lo_initialize(LibreOfficeKit* pThis, const char* pAppPath)
 
     try
     {
-        osl_setCommandArgs(0, NULL);
+        // If we've set up the command args elsewhere then we cannot do it
+        // again (as an assert will fire), this will be the case e.g.
+        // for unit tests (and possibly if UNO is being used in addition
+        // to LOK in an external program).
+        if (!osl_areCommandArgsSet())
+        {
+            osl_setCommandArgs(0, NULL);
+        }
         initialize_uno(aAppURL);
         force_c_locale();