Generate a new copy of the amount string when copying a QIF split.

Prevents a double free error when both the original and the copy split
are destroyed.


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@11830 57a11ea4-9604-0410-9ed3-97b8803252fd

src/import-export/qif/qif-objects.c

@@ -489,6 +489,7 @@ qif_split_copy(QifSplit split)
 
   memcpy(s, split, sizeof(*s));
   if (s->memo) s->memo = g_strdup(s->memo);
+  if (s->amountstr) s->amountstr = g_strdup(s->amountstr);
   if (s->catstr) s->memo = g_strdup(s->catstr);
 
   return s;