rrd_graph: initialize new data member (fix #441)

primary_axis_format was added to image_desc_t but rrd_graph_init was not
updated to initialize it, resulting in this error when the garbage
values were used as axis labels:

(process:24893): Pango-WARNING **: Invalid UTF-8 string passed to pango_layout_set_text()

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 0bc5dbdbe5c0d2a4995cf0dbc83db2f22fc48a1f..9662231b4daedeabee4fb4a0cbb96172b0806e35 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -4347,6 +4347,7 @@ void rrd_graph_init(
     im->second_axis_shift = 0; /* no shift by default */
     im->second_axis_legend[0] = '\0';
     im->second_axis_format[0] = '\0';
+    im->primary_axis_format[0] = '\0';
     im->yorigin = 0;
     im->yOriginLegend = 0;
     im->yOriginLegendY = 0;