fix for segfault condition in print_calc

 -- Paul Clifford <paul.clifford@bbc.co.uk>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@161 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 18be573..2fc6526 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -1285,6 +1285,7 @@ print_calc(image_desc_t *im, char ***prdata)
 
            if (im->gdes[i].gf == GF_PRINT){
                (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
+               (*prdata)[prlines-1] = NULL;
                if (bad_format(im->gdes[i].format)) {
                        rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
                        return -1;
@@ -1294,7 +1295,6 @@ print_calc(image_desc_t *im, char ***prdata)
 #else
                sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
 #endif
-               (*prdata)[prlines-1] = NULL;
            } else {
                /* GF_GPRINT */