SVG: Init newly allocated strings

Graph definition is made of successive SVG "path" commands concatenated
together. Make sure that the strings allocated to receive these definitions
are initialized before being used.

Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>

diff --git a/svg_stats.c b/svg_stats.c
index 5b05c8f38ee1c70357f11e8aaae1936ba81f94f5..9b63d3cdccff18ecf71a24549d2dc38cec7b8ab6 100644 (file)
--- a/svg_stats.c
+++ b/svg_stats.c
@@ -223,8 +223,9 @@ char **allocate_graph_lines(int n, int **outsize, double **spmin, double **spmax
                        exit(4);
                }
                *(out + i) = out_p;
+               *out_p = '\0';                  /* Reset string so that it can be safely strncat()'d later */
                *(*outsize + i) = CHUNKSIZE;    /* Each array of chars has a default size of CHUNKSIZE */
-               *(*spmin + i) = DBL_MAX;
+               *(*spmin + i) = DBL_MAX;        /* Init min and max values */
                *(*spmax + i) = -DBL_MAX;
        }