Test failures don't cause an error

[mithro]

make[1]: Entering directory `/home/travis/build/timsvideo/gst-switch/tests'
1008pkill gst-switch-srv || true
1009pkill gst-switch-ui || true
1010./test-switch-server  --enable-test-audio || true
1011/gst-switch/audio: 
1012./tests/test_switch_server.c:463:info: server 8121
1013Running test-audio-source2 (20 seconds)
1014Running test-audio-source1 (20 seconds)
1015Running test-audio-source3 (20 seconds)
1016Running test_audio_preview_sink3 (20 seconds)
1017Running test_audio_preview_sink1 (20 seconds)
1018Running test_audio_preview_sink2 (20 seconds)
1019./tests/test_switch_server.c:529:error: test_audio_preview_sink1: 1 errors
1020./tests/test_switch_server.c:529:error: test_audio_preview_sink2: 1 errors
1021./tests/test_switch_server.c:529:error: test_audio_preview_sink3: 1 errors
1022**
1023ERROR:test_switch_server.c:1517:void test_audio(): assertion failed: (sink1.pass)
1024/bin/bash: line 1:  8120 Aborted                 ./test-switch-server --enable-test-audio
1025make[1]: Leaving directory `/home/travis/build/timsvideo/gst-switch/tests'
1026make[1]: Entering directory `/home/travis/build/timsvideo/gst-switch/tests'

[duzy]

#21