Fix #73434: Null byte at end of array keys in getLastResponseInfo

In PHP 7, the terminating NUL has to be excluded from the keys.
Otherwise, the userland developer might even accidentally overwrite the
terminating NUL …

Author: cmb69

php_oauth.h

@@ -294,9 +294,9 @@ zend_string *oauth_generate_sig_base(php_so_object *soo, const char *http_method
 	smart_string_free(&(a)->curl_info);
 
 /* this and code that uses it is from ext/curl/interface.c */
-#define CAAL(s, v) add_assoc_long_ex(&info, s, sizeof(s), (long) v);
-#define CAAD(s, v) add_assoc_double_ex(&info, s, sizeof(s), (double) v);
-#define CAAS(s, v) add_assoc_string_ex(&info, s, sizeof(s), (char *) (v ? v : ""));
+#define CAAL(s, v) add_assoc_long_ex(&info, s, sizeof(s) - 1, (long) v);
+#define CAAD(s, v) add_assoc_double_ex(&info, s, sizeof(s) - 1, (double) v);
+#define CAAS(s, v) add_assoc_string_ex(&info, s, sizeof(s) - 1, (char *) (v ? v : ""));
 
 #define ADD_DEBUG_INFO(a, k, s, t) \
 	if(s.len) { \