src/rrd_graph.c: fix gcc warning "assignment discards 'const' qualifier"

rrd_graph.c:5221:25: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
        im->imginfo = poptions->optarg;
                    ^

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index a03c4bb8ce276a7f95ff358474633150818b9e60..a38c17aa2ea51f87ed75a72660546130451fb4f4 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -5218,7 +5218,7 @@ void rrd_graph_options(
             im->rigid = 1;
             break;
         case 'f':
-            im->imginfo = poptions->optarg;
+            im->imginfo = (char *)poptions->optarg;
             break;
         case 'a':
             if ((int)