Use the strchr() function instead of the legacy index() function.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 read_config_file.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: ltrace-0.5.3/read_config_file.c
===================================================================
--- ltrace-0.5.3.orig/read_config_file.c
+++ ltrace-0.5.3/read_config_file.c
@@ -83,7 +83,7 @@
 
 	while (tmp->name) {
 		if (!strncmp(*str, tmp->name, strlen(tmp->name))
-				&& index(" ,()#*;012345[", *(*str + strlen(tmp->name)))) {
+				&& strchr(" ,()#*;012345[", *(*str + strlen(tmp->name)))) {
 			*str += strlen(tmp->name);
 			return lookup_prototype(tmp->pt);
 		}