Exit returns correct exit code

aidge_backend_cpu @ ef96324d

-Subproject commit c995551a3ea6c6e9454d60ba16c31ed1469cb498
+Subproject commit ef96324d712d42bf729db96719606696001a3ecf

aidge_core @ 1b19726b

-Subproject commit f877bcd3979b4a4c5b400642d1db98eaabeecdaf
+Subproject commit 1b19726b5b5de0894ff10703b907dc5657bd8051

setup.ps1

@@ -13,11 +13,11 @@ if (-not $env:AIDGE_INSTALL_PATH)
 # aidge_core
 Set-Location aidge/aidge_core
 . .\setup.ps1 -install_reqs:$install_reqs
-if(!$?) { Set-Location $PSScriptRoot; Exit $LASTEXITCODE }
+if(!$?) { $lastError = $LASTEXITCODE; Set-Location $PSScriptRoot; Exit $lastError }
 Set-Location $PSScriptRoot
 
 # aidge_backend_cpu
 Set-Location aidge/aidge_backend_cpu
-if(!$?) { Set-Location $PSScriptRoot; Exit $LASTEXITCODE }
+if(!$?) { $lastError = $LASTEXITCODE; Set-Location $PSScriptRoot; Exit $lastError }
 . .\setup.ps1 -install_reqs:$install_reqs
 Set-Location $PSScriptRoot