MonetDB: Dec2011 - Protect against NULL pointer.

[Sjoerd Mullender]

Changeset: 9b50e20e0fef for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=9b50e20e0fef
Modified Files:
        sql/backends/monet5/sql_result.mx
Branch: Dec2011
Log Message:

Protect against NULL pointer.
It may be that a query is being prepared that does not involve a named
table.  Try e.g. prepareresult select count(*) from _tables;


diffs (12 lines):

diff --git a/sql/backends/monet5/sql_result.mx 
b/sql/backends/monet5/sql_result.mx
--- a/sql/backends/monet5/sql_result.mx
+++ b/sql/backends/monet5/sql_result.mx
@@ -709,7 +709,7 @@ mvc_export_prepare(mvc *c, stream *out, 
                        name = e->rname;
                        if (!name && e->type == e_column && e->l)
                                name = e->l;
-                       slen = strlen(name);
+                       slen = name ? strlen(name) : 0;
                        if (slen > len5)
                                len5 = slen;
                        name = e->name;
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