Add missing failure check.

build-ce.bat

@@ -83,6 +83,7 @@ echo Compiling Inno Setup done
 if exist .\setup-presign.bat (
   echo - Presigning
   call .\setup-presign.bat Files\ISCC.exe Files\ISCmplr.dll Files\ISPP.dll
+  if errorlevel 1 goto failed
   echo Presign done
 )
 

build.bat

@@ -77,6 +77,7 @@ echo Compiling Inno Setup done
 if exist .\setup-presign.bat (
   echo - Presigning
   call .\setup-presign.bat Files\ISCC.exe Files\ISCmplr.dll Files\ISPP.dll
+  if errorlevel 1 goto failed
   echo Presign done
 )