Assert ASCII precond of rtl_uString_newFromAscii/Literal

...and there is no reason for such a precond for rtl_string_newFromLiteral

Change-Id: I27f7217c8db17cef860c37886d0f7e561dc852f8

sal/rtl/strtmpl.cxx

@@ -1374,9 +1374,9 @@ void SAL_CALL IMPL_RTL_STRINGNAME( newFromLiteral )( IMPL_RTL_STRINGDATA** ppThi
     sal_Int32 nCount;
     for( nCount = nLen; nCount > 0; --nCount )
     {
-        /* Check ASCII range */
-        SAL_WARN_IF( ((unsigned char)*pCharStr) > 127, "rtl.string",
-                    "rtl_uString_newFromLiteral - Found char > 127" );
+#if IMPL_RTL_IS_USTRING
+        assert(static_cast<unsigned char>(*pCharStr) < 0x80); // ASCII range
+#endif
         SAL_WARN_IF( ((unsigned char)*pCharStr) == '\0', "rtl.string",
                     "rtl_uString_newFromLiteral - Found embedded \\0 character" );
 

sal/rtl/ustring.cxx

@@ -501,10 +501,7 @@ void SAL_CALL rtl_uString_newFromAscii( rtl_uString** ppThis,
         sal_Unicode* pBuffer = (*ppThis)->buffer;
         do
         {
-            /* Check ASCII range */
-            SAL_WARN_IF( ((unsigned char)*pCharStr) > 127, "rtl.string",
-                        "rtl_uString_newFromAscii - Found char > 127" );
-
+            assert(static_cast<unsigned char>(*pCharStr) < 0x80); // ASCII range
             *pBuffer = *pCharStr;
             pBuffer++;
             pCharStr++;