- fixed intro movie playback with sound disabled.

It would never do anything because the sound callback cannot make it advance if it isn't called.
Of course without sound it isn't properly synchronized - still better than nothing.

source/exhumed/src/movie.cpp

@@ -269,7 +269,7 @@ void PlayMovie(const char* fileName)
 
             // audio is king for sync - if the backend doesn't need any more samples yet, 
             // don't process any more movie file data.
-            if (!bServedSample) {
+            if (!bServedSample && hFx > 0) {
                 continue;
             }