do not capture

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 5e734f3e993329c26157c31a6c0f072653439e24..fbb9ec118b66abb7d19a39e7f88fda6cbdeb3b98 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -4818,7 +4818,7 @@ static int bad_format_check(const char *pattern, char *fmt) {
 int bad_format_imginfo(char *fmt){
     return bad_format_check("^" SAFE_STRING "%s" SAFE_STRING "%lu" SAFE_STRING "%lu" SAFE_STRING "$",fmt);
 }
-#define FLOAT_STRING "%[-+ 0#]?[0-9]*([.][0-9]+)?l[eEfF]"
+#define FLOAT_STRING "%[-+ 0#]?[0-9]*(?:[.][0-9]+)?l[eEfF]"
 
 int bad_format_axis(char *fmt){
     return bad_format_check("^" SAFE_STRING FLOAT_STRING SAFE_STRING "$",fmt);