Fix json output when printing legend entries

Branch 1.4 is missing this patch in order to produce valid json output.
This is related to issue #380 reported by apfeiffe.

diff --git a/src/rrd_tool.c b/src/rrd_tool.c
index ddcdccccecc98c535ca1acaa13a64358d99ed0f7..57e22ce0d6c1278985d0e0630ca73946d3b3d39e 100644 (file)
--- a/src/rrd_tool.c
+++ b/src/rrd_tool.c
@@ -766,7 +766,7 @@ int HandleInputLine(
                 char     *entry = NULL;
                 entry = legend_v[j];
                 if (json){
-                    printf("      '%s'", entry);
+                    printf("      \"%s\"", entry);
                     if (j < col_cnt -1){
                         printf(",");
                     }