fix crash on startup from iconv_close of an invalid descriptor

1 files changed, 2 insertions, 1 deletions

diff --git a/src/FbTk/FbString.cc b/src/FbTk/FbString.cc
index d3f6b81..ff4d27a 100644
--- a/src/FbTk/FbString.cc
+++ b/src/FbTk/FbString.cc
@@ -261,7 +261,8 @@ bool StringConvertor::setSource(const std::string &encoding) {
     if (newiconv == ((iconv_t)(-1)))
         return false;
     else {
-        iconv_close(m_iconv);
+        if (m_iconv != ((iconv_t)-1))
+            iconv_close(m_iconv);
         m_iconv = newiconv;
         return true;
     }