backtrace: Suppress dumb GCC warning on x86-64.

Without this change GCC warns "use of assignment suppression and length
modifier together in scanf format", which doesn't actually point out any
real problem (and why would it?  Google turns up nothing interesting).

diff --git a/lib/backtrace.c b/lib/backtrace.c
index 0999a081ecb351e9e0c530b43010cadc7c4dcf10..42ab8c48b70b59524c054530385f14c060b75cf7 100644 (file)
--- a/lib/backtrace.c
+++ b/lib/backtrace.c
@@ -42,7 +42,7 @@ get_max_stack(void)
     for (line_number = 1; fgets(line, sizeof line, f); line_number++) {
         if (strstr(line, "[stack]")) {
             uintptr_t end;
-            if (sscanf(line, "%*"SCNxPTR"-%"SCNxPTR, &end) != 1) {
+            if (sscanf(line, "%*x-%"SCNxPTR, &end) != 1) {
                 VLOG_WARN("%s:%d: parse error", file_name, line_number);
                 continue;
             }