applications: serial_lte_modem: Fix AT#XHTTPCREQ crash

[MarkusLassila]

Fixes a crash when AT#XHTTPCREQ is called when thread from previous call is still in process.

The issue had been seen earlier with multiple thread, but the correction never made it to main:
#10285

[NordicBuilder]

CI Information

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Build number: 1

Inputs:

Sources:

sdk-nrf: PR head: e3b305be13878b55bea2077b1d25f0f4b8bffccc

more details

sdk-nrf:

PR head: e3b305be13878b55bea2077b1d25f0f4b8bffccc
merge base: e3026d627317467d31276584ce8bbd9d87096e1d
target head (main): 403c28c46e584b01f8579b0846d422fd6232efc3
Diff

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (1)

applications
│  ├── serial_lte_modem
│  │  ├── src
│  │  │  ├── http_c
│  │  │  │  │ slm_at_httpc.c

Outputs:

Toolchain

Version: 342151af73
Build docker image: docker-dtr.nordicsemi.no/sw-production/ncs-build:342151af73_912848a074

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ◻️ Toolchain - Skipped: existing toolchain is used
• ✅ Build twister
  • sdk-nrf test count: 38
• ✅ Integration tests
  • ✅ test-fw-nrfconnect-nrf-iot_serial_lte_modem

Disabled integration tests

• • desktop52_verification
  • doc-internal
  • test_ble_nrf_config
  • test-fw-nrfconnect-apps
  • test-fw-nrfconnect-ble_mesh
  • test-fw-nrfconnect-ble_samples
  • test-fw-nrfconnect-boot
  • test-fw-nrfconnect-chip
  • test-fw-nrfconnect-fem
  • test-fw-nrfconnect-nfc
  • test-fw-nrfconnect-nrf-iot_libmodem-nrf
  • test-fw-nrfconnect-nrf-iot_lwm2m
  • test-fw-nrfconnect-nrf-iot_mosh
  • test-fw-nrfconnect-nrf-iot_positioning
  • test-fw-nrfconnect-nrf-iot_samples
  • test-fw-nrfconnect-nrf-iot_thingy91
  • test-fw-nrfconnect-nrf-iot_zephyr_lwm2m
  • test-fw-nrfconnect-nrf_crypto
  • test-fw-nrfconnect-ps
  • test-fw-nrfconnect-rpc
  • test-fw-nrfconnect-rs
  • test-fw-nrfconnect-tfm
  • test-fw-nrfconnect-thread
  • test-fw-nrfconnect-zigbee
  • test-low-level
  • test-sdk-audio
  • test-sdk-dfu
  • test-sdk-find-my
  • test-sdk-mcuboot
  • test-sdk-pmic-samples
  • test-sdk-sidewalk
  • test-sdk-wifi
  • test-secdom-samples-public

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[NordicBuilder]

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