WaE: Unreachable code: Use SAL_WNOUNREACHABLE_CODE_PUSH/POP

Cleaner than my first attempt.

This reverts commit 9c0ba0ba.

Change-Id: Iec9da427ab2a92cb0765f73af14d83a37f765290

ucbhelper/source/client/content.cxx

@@ -1057,6 +1057,9 @@ sal_Bool Content::isFolder()
 }
 
 //=========================================================================
+
+SAL_WNOUNREACHABLE_CODE_PUSH
+
 sal_Bool Content::isDocument()
     throw( CommandAbortedException, RuntimeException, Exception )
 {
@@ -1072,13 +1075,13 @@ sal_Bool Content::isDocument()
                     get() ) ),
          m_xImpl->getEnvironment() );
 
-#if !(defined(_MSC_VER) && defined(ENABLE_LTO))
     // Unreachable - cancelCommandExecution always throws an exception,
     // But some compilers complain...
     return sal_False;
-#endif
 }
 
+SAL_WNOUNREACHABLE_CODE_POP
+
 //=========================================================================
 //=========================================================================
 //