Initialize variable to prevent compiler warning

(cherry picked from commit 4fba97b33858a6fc610b5540ab0277370e4147bf)

Change-Id: I470036762114017a971a35aba2c7f0f41f482fa8
diff --git a/svx/source/sidebar/insert/SimpleToolBoxController.cxx b/svx/source/sidebar/insert/SimpleToolBoxController.cxx
index 5eba6da..c60b6ef 100644
--- a/svx/source/sidebar/insert/SimpleToolBoxController.cxx
+++ b/svx/source/sidebar/insert/SimpleToolBoxController.cxx
@@ -62,7 +62,7 @@ void SAL_CALL SimpleToolBoxController::statusChanged (const css::frame::FeatureS
    nItemBits &= ~TIB_CHECKABLE;
    TriState eState = STATE_NOCHECK;

    sal_Bool bValue;
    sal_Bool bValue = sal_False;
    if (rEvent.State >>= bValue)
    {
        // Boolean, treat it as checked/unchecked