Fix error message in read_symbol_table
diff --git a/ltrace-elf.c b/ltrace-elf.c
index aeb643e..905c299 100644
--- a/ltrace-elf.c
+++ b/ltrace-elf.c
@@ -317,7 +317,7 @@
 	if (scn == NULL || gelf_getshdr(scn, &shdr2) == NULL) {
 		fprintf(stderr, "Couldn't get header of section"
 			" #%d from \"%s\": %s\n",
-			shdr2.sh_link, filename, elf_errmsg(-1));
+			shdr->sh_link, filename, elf_errmsg(-1));
 		exit(EXIT_FAILURE);
 	}