resample: fix UINT32_MAX fallback

Reported by Mark Harris

(cherry picked from speexdsp commit 7181b9e84fbf6887c74807af5ad0030a5181640a)
1 job for bugfix/resampler-uint in 59 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #363
docker alpine
build-gcc

00:00:59