just use rtl::OUString::createFromAscii

Change-Id: I425e7bcc8f81b2d67a98244ba4419ace1ba569ec

cppu/source/uno/env_subst.cxx

@@ -37,9 +37,8 @@ CPPU_DLLPUBLIC void SAL_CALL uno_getEnvironment(uno_Environment ** ppEnv,
         rtl::OString a_envDcp(a_envName.copy(a_envName.indexOf(':') + 1));
 
         OSL_TRACE("UNO_ENV_SUBST \"%s\" -> \"%s\"", a_envDcp.getStr(), c_value);
-        rtl::OUString value(c_value, rtl_str_getLength(c_value), RTL_TEXTENCODING_ASCII_US);
 
-        envDcp = value;
+        envDcp = rtl::OUString::createFromAscii(c_value);
     }
 
     uno_direct_getEnvironment(ppEnv, envDcp.pData, pContext);