TT#73652 pv_headers: fix detection of branch flag

* this error was introduced at 184ec37472

Change-Id: I2ccd6f9d2ec7341aa7a6eccfbddb8c966d258a2d

debian/patches/sipwise/add_pv_headers_module.patch

@@ -1,8 +1,6 @@
 From: Sipwise Development Team <support@sipwise.com>
 Date: Mon, 18 Nov 2019 10:36:39 +0100
 Subject: add_pv_headers_module
-
-Change-Id: I2e0dd0bd8ff2eaafeaf2114886f1b7ea0cf08470
 ---
  src/Makefile.groups                             |    2 +-
  src/modules/pv_headers/Makefile                 |   12 +
@@ -1337,7 +1335,7 @@ index 0000000..556b7bf
 +#endif /* PV_HEADERS_H */
 diff --git a/src/modules/pv_headers/pvh_func.c b/src/modules/pv_headers/pvh_func.c
 new file mode 100644
-index 0000000..1340500
+index 0000000..22ee74e
 --- /dev/null
 +++ b/src/modules/pv_headers/pvh_func.c
 @@ -0,0 +1,388 @@
@@ -1394,7 +1392,7 @@ index 0000000..1340500
 +				return -1;
 +			}
 +		} else {
-+			if(isbflagset(br_idx, FL_PV_HDRS_COLLECTED)) {
++			if(isbflagset(br_idx, FL_PV_HDRS_COLLECTED) == 1) {
 +				LM_ERR("headers are already collected\n");
 +				return -1;
 +			}