fix: OneDrive check (#17033)

service.bat

@@ -532,6 +532,7 @@ if !errorlevel!==0 (
 echo:
 
 :: OneDrive
+if defined OneDrive (
     echo %~dp0\ | findstr /I /C:"%OneDrive%\\" > nul
     if !errorlevel!==0 (
         call :PrintRed "[X] Zapret is installed in a OneDrive folder"
@@ -539,6 +540,9 @@ if !errorlevel!==0 (
     ) else (
         call :PrintGreen "OneDrive check passed"
     )
+) else (
+    call :PrintGreen "OneDrive check passed"
+)
 echo:
 
 :: WinDivert64.sys file