Fix escaping backslashes in JSON in inspect.c.

Change-Id: I1a43ed3c13ce1f8a0a6673f8d54fc82abcfeca5b
diff --git a/examples/inspect.c b/examples/inspect.c
index 546ec29..5c54c55 100644
--- a/examples/inspect.c
+++ b/examples/inspect.c
@@ -258,7 +258,7 @@
   int i;
   int j = 0;
   for (i = 0; str[i] != '\0'; i++) {
-    if (str[i] == '"') {
+    if (str[i] == '"' || str[i] == '\\') {
       buffer[j++] = '\\';
     }
     buffer[j++] = str[i];