call.c (build_user_type_conversion_1): Do set ICS_BAD_FLAG if all the ambiguous…

call.c (build_user_type_conversion_1): Do set ICS_BAD_FLAG if all the ambiguous conversions are bad.

        * call.c (build_user_type_conversion_1): Do set ICS_BAD_FLAG if
        all the ambiguous conversions are bad.

From-SVN: r61249

gcc/testsuite/g++.dg/overload/ambig2.C

+// Bug: g++ thought that the QChar overload was a viable but ambiguous
+// candidate.  It isn't viable, because there's no conversion from const
+// char * to QChar.
+
+class QChar {
+public:
+    QChar( char c );
+    QChar( unsigned char c );
+};
+
+class QString
+{
+public:
+    QString( const char *str );                 // deep copy
+
+    QString    &insert( unsigned int index, const QString & );
+    QString    &insert( unsigned int index, QChar );
+    QString    &prepend( const char* );
+};
+
+inline QString &QString::prepend( const char* s )
+{ return insert(0,s); }