avoid implicit casting

connectivity/source/drivers/mozab/mozillasrc/MTypeConverter.cxx

@@ -39,7 +39,7 @@ using namespace connectivity::mozab;
 void MTypeConverter::ouStringToNsString(::rtl::OUString const &ous, nsString &nss)
 {
     // Convert to ::rtl::OString (utf-8 encoding).
-    ::rtl::OString os(ous,ous.getLength(), RTL_TEXTENCODING_UTF8);
+    ::rtl::OString os(rtl::OUStringToOString(ous, RTL_TEXTENCODING_UTF8));
 
     const char *cs = os.getStr();
     PRUint32 csLen = os.getLength();
@@ -100,7 +100,7 @@ void MTypeConverter::prUnicharToOUString(PRUnichar const *pru, ::rtl::OUString &
 char *MTypeConverter::ouStringToCCharStringUtf8(::rtl::OUString const &ous)
 {
     // Convert to ::rtl::OString,
-    ::rtl::OString os(ous,ous.getLength(), RTL_TEXTENCODING_UTF8);
+    ::rtl::OString os(rtl::OUStringToOString(ous, RTL_TEXTENCODING_UTF8));
 
     const char *cs = os.getStr();
 
@@ -110,7 +110,7 @@ char *MTypeConverter::ouStringToCCharStringUtf8(::rtl::OUString const &ous)
 char *MTypeConverter::ouStringToCCharStringAscii(::rtl::OUString const &ous)
 {
     // Convert ::rtl::OUString to ::rtl::OString,
-    ::rtl::OString os(ous,ous.getLength(), RTL_TEXTENCODING_ASCII_US);
+    ::rtl::OString os(rtl::OUStringToOString(ous, RTL_TEXTENCODING_ASCII_US));
 
     return(strdup(os.getStr()));
 }
@@ -126,7 +126,7 @@ char *MTypeConverter::nsStringToCCharStringAscii(nsString const &nss)
 ::std::string MTypeConverter::ouStringToStlString(::rtl::OUString const &ous)
 {
     // Convert ::rtl::OUString to ::rtl::OString.
-    ::rtl::OString os(ous,ous.getLength(),RTL_TEXTENCODING_ASCII_US);
+    ::rtl::OString os(rtl::OUStringToOString(ous,RTL_TEXTENCODING_ASCII_US));
     return( ::std::string(os.getStr()));
 }
 // -------------------------------------------------------------------------