Give the read file error segfault a bug # in BUGS

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@419 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

BUGS

@@ -76,6 +76,8 @@
 - When typing in a string in serahc or replace and hitting CASE_SENSITVE
   or the other search string, the current string edit is blown away in
   favor of the last stored search (47) [FIXED]
+- If nano fails to open a file when it starts up,doing almost anything
+  causes a segfault (discovered by Ben Roberts) (48). [FIXED]
 
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