No bytecodecompare if tests failed (issue #2300)

Fix PR #3113

appveyor.yml

@@ -73,6 +73,7 @@ test_script:
     - cd %APPVEYOR_BUILD_FOLDER%\build\test\%CONFIGURATION%
     - soltest.exe --show-progress -- --no-ipc --no-smt
 # Skip bytecode compare if private key is not available
+    - cd %APPVEYOR_BUILD_FOLDER%
     - ps: if ($env:priv_key) {
         scripts\bytecodecompare\storebytecode.bat $Env:CONFIGURATION $bytecodedir
         }