conncache: silence -Wnull-dereference on gcc 14 RISC-V 64
#19378
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A false positive that appeared after a recent patch for no reason.
Seen in curl-for-win native Linux builds on debian:testing and
debian:trixie with gcc 14.3.0 and 14.2.0 respectively:
```
-- curl version=[8.17.1-DEV]
-- The C compiler identification is GNU 14.2.0
-- Cross-compiling: Linux/x86_64 -> Linux/riscv64
[...]
/home/runner/work/curl-for-win/curl-for-win/curl/lib/conncache.c: In function 'Curl_cpool_conn_now_idle':
/home/runner/work/curl-for-win/curl-for-win/curl/lib/conncache.c:539:11: error: null pointer dereference [-Werror=null-dereference]
539 | if(!data->multi->maxconnects) {
| ~~~~^~~~~~~
cc1: all warnings being treated as errors
```
Ref: https://github.com/curl/curl-for-win/actions/runs/19111497271/job/54609512969#step:3:5788
```
-- The C compiler identification is GNU 14.3.0
```
Ref: https://github.com/curl/curl-for-win/actions/runs/19111497271/job/54609512899#step:3:5801
Patch confirmed silencing it:
https://github.com/curl/curl-for-win/actions/runs/19112580362/job/54613288202
Follow-up to fbc4d59 curl#19271
vszakats
changed the title
-Wnull-dereference on RISC-V 64-Wnull-dereference on gcc 14 RISC-V 64
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A false positive that appeared after a recent patch for no reason.
Seen in curl-for-win unity native Linux builds on debian:testing and
debian:trixie with gcc 14.3.0 and 14.2.0 respectively:
Ref: https://github.com/curl/curl-for-win/actions/runs/19111497271/job/54609512969#step:3:5788
Ref: https://github.com/curl/curl-for-win/actions/runs/19111497271/job/54609512899#step:3:5801
Patch confirmed silencing:
https://github.com/curl/curl-for-win/actions/runs/19112580362/job/54613288202
Follow-up to fbc4d59 #19271