-Werror,-Wconstant-conversion

"implicit conversion from 'long' to 'sal_uInt16' (aka 'unsigned short') changes
value from 9223372036854775807 to 65535," and at least the call to getHandle for
the long nHand argument of SwFltControlStack::SetAttr in
SwWW8ImplReader::Read_AtnBook makes it look like it better return long?

Change-Id: I594ac3ee60a72c0eb2e13f802371ff1e8ade7676

sw/source/filter/ww8/ww8scan.cxx

@@ -4346,7 +4346,7 @@ void WW8PLCFx_AtnBook::advance()
     }
 }
 
-sal_uInt16 WW8PLCFx_AtnBook::getHandle() const
+long WW8PLCFx_AtnBook::getHandle() const
 {
     if (!m_pBook[0] || !m_pBook[1])
         return LONG_MAX;

sw/source/filter/ww8/ww8scan.hxx

@@ -796,7 +796,7 @@ public:
     virtual void advance() SAL_OVERRIDE;
 
     /// Handle is the unique ID of an annotation mark.
-    sal_uInt16 getHandle() const;
+    long getHandle() const;
     bool getIsEnd() const;
 };