Clang's static code analysis flagged the following warnings against the latest master branch

[kcgen]

libspeexdsp/resample.c

2019-09-26T07:57:10.4651694Z analyze-build: INFO: /home/runner/work/dosbox-staging/dosbox-staging/src/libs/decoders/internal/speexdsp/libspeexdsp/resample.c:735:23: warning: Value stored to 'olen' during its initialization is never read
2019-09-26T07:57:10.4653274Z analyze-build: INFO:          spx_uint32_t olen = old_length;
2019-09-26T07:57:10.4654545Z analyze-build: INFO:                       ^~~~   ~~~~~~~~~~
2019-09-26T07:57:10.4655365Z analyze-build: INFO: 1 warning generated.

libspeexdsp/scal.c

2019-09-26T07:59:18.0313547Z analyze-build: INFO: /home/runner/work/dosbox-staging/dosbox-staging/src/libs/decoders/internal/speexdsp/libspeexdsp/scal.c:155:11: warning: Value stored to 'N' during its initialization is never read
2019-09-26T07:59:18.0314718Z analyze-build: INFO:       int N=2*st->frame_size;
2019-09-26T07:59:18.0315251Z analyze-build: INFO:           ^ ~~~~~~~~~~~~~~~~
2019-09-26T07:59:18.0315771Z analyze-build: INFO: 1 warning generated.