tests: fix potentially uninitialized variables

Author: nto

tests/upipe_a52_framer_test.c

@@ -109,7 +109,7 @@ static void test_input(struct upipe *upipe, struct uref *uref,
 
     uint8_t *buffer = malloc(size);
     assert(buffer);
-    uref_block_extract(uref, 0, size, buffer);
+    ubase_assert(uref_block_extract(uref, 0, size, buffer));
 
     assert(size == a52_get_frame_size(a52_get_fscod(buffer),
                                       a52_get_frmsizecod(buffer)));

tests/upipe_avcodec_test.c

@@ -131,10 +131,10 @@ static int catch_avcenc(struct uprobe *uprobe, struct upipe *upipe,
         return uprobe_throw_next(uprobe, upipe, event, args);
     }
 
-    upipe_get_flow_def(upipe, &flow);
+    ubase_assert(upipe_get_flow_def(upipe, &flow));
     assert(flow != NULL);
-    uref_xflow_get_num(flow, &num);
-    uref_flow_get_def(flow, &def);
+    ubase_assert(uref_xflow_get_num(flow, &num));
+    ubase_assert(uref_flow_get_def(flow, &def));
     assert(def != NULL);
 
     /* decoder lives in encoder's thread */

tests/upipe_multicat_test.c

@@ -154,7 +154,7 @@ static void test_input(struct upipe *upipe, struct uref *uref,
 
     static uint64_t systime = 0;
     uint64_t cr_sys;
-    uref_clock_get_cr_sys(uref, &cr_sys);
+    ubase_assert(uref_clock_get_cr_sys(uref, &cr_sys));
     assert(cr_sys == systime);
 
     int size = -1;