WaE: VarDecl, use "bool" instead of "sal_Bool"

Change-Id: I0b868edad579f9ccf46f6d9f6015086557e528da
diff --git a/sal/osl/unx/mutex.cxx b/sal/osl/unx/mutex.cxx
index 4bc726d..7c8b365 100644
--- a/sal/osl/unx/mutex.cxx
+++ b/sal/osl/unx/mutex.cxx
@@ -117,7 +117,7 @@ sal_Bool SAL_CALL osl_acquireMutex(oslMutexImpl *pMutex)

sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutexImpl *pMutex)
{
    sal_Bool result = sal_False;
    bool result = false;

    SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");

@@ -126,7 +126,7 @@ sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutexImpl *pMutex)
        int nRet = 0;
        nRet = pthread_mutex_trylock(&(pMutex->mutex));
        if ( nRet == 0  )
            result = sal_True;
            result = true;
    }

    SAL_INFO("sal.osl.mutex", "osl_tryToAcquireMutex(" << pMutex << "): " << (result ? "YES" : "NO"));