Move the setjmp into a function by itself

Move the setjmp present in the function
'row_mt_worker_hook' into a function by itself.
This would prevent the build warning : variable
might be clobbered by ‘longjmp’ or ‘vfork’.

Change-Id: I3599d057a25abc978e0b568ac3074a27554216cb

av1/decoder/decodeframe.c

diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index 73f7049..973cc4c 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -3047,6 +3047,16 @@
 #endif
 }
 
+static int call_setjmp(DecWorkerData *const thread_data) {
+  if (setjmp(thread_data->error_info.jmp)) {
+    thread_data->error_info.setjmp = 0;
+    thread_data->td->xd.corrupted = 1;
+    return 0;
+  }
+  thread_data->error_info.setjmp = 1;
+  return 1;
+}
+
 static int tile_worker_hook(void *arg1, void *arg2) {
   DecWorkerData *const thread_data = (DecWorkerData *)arg1;
   AV1Decoder *const pbi = (AV1Decoder *)arg2;
@@ -3054,12 +3064,9 @@
   ThreadData *const td = thread_data->td;
   uint8_t allow_update_cdf;
 
-  if (setjmp(thread_data->error_info.jmp)) {
-    thread_data->error_info.setjmp = 0;
-    thread_data->td->xd.corrupted = 1;
+  if (!call_setjmp(thread_data)) {
     return 0;
   }
-  thread_data->error_info.setjmp = 1;
 
   allow_update_cdf = cm->large_scale_tile ? 0 : 1;
   allow_update_cdf = allow_update_cdf && !cm->disable_cdf_update;
@@ -3094,12 +3101,9 @@
   ThreadData *const td = thread_data->td;
   uint8_t allow_update_cdf;
 
-  if (setjmp(thread_data->error_info.jmp)) {
-    thread_data->error_info.setjmp = 0;
-    thread_data->td->xd.corrupted = 1;
+  if (!call_setjmp(thread_data)) {
     return 0;
   }
-  thread_data->error_info.setjmp = 1;
 
   const int num_planes = av1_num_planes(cm);
   allow_update_cdf = cm->large_scale_tile ? 0 : 1;