reintroduce removed line, fdo#62402

This line was removed with dd3e879c but
is needed. Special thanks to Joren for bibisecting and bisecting.

Change-Id: Id2b3de4098db75571006e6e62b77efe8c491b06f

svx/source/engine3d/camera3d.cxx

@@ -117,6 +117,8 @@ void Camera3D::SetBankAngle(double fAngle)
     }
 
     // Calculate from aDiff to uppwards pointing View-Up-Vector
+    // duplicated line is intentional!
+    aPrj = aPrj.getPerpendicular(aDiff);
     aPrj = aPrj.getPerpendicular(aDiff);
     aDiff.normalize();