fix bug in install_wufuc.bat

there was a bug that would cause the installer to crash if it was
located in a path that had any parentheses.

setup-batch/install_wufuc.bat

@@ -50,7 +50,9 @@ goto :get_ver
 set "WINDOWS_ARCHITECTURE=x64"
 set "wufuc_dll=%~dp0wufuc64.dll"
 
-if not exist "%wufuc_dll%" (
+if exist "%wufuc_dll%" (
+    goto :get_ver
+)
 echo ERROR - Could not find %wufuc_dll%!
 echo.
 echo This most likely means you tried to clone the repository.
@@ -64,7 +66,6 @@ if not exist "%wufuc_dll%" (
 echo This error could also mean that your anti-virus deleted or quarantined wufuc
 echo in which case, you will need to make an exception and restore it.
 goto :die
-)
 
 :get_ver
 for /f "tokens=*" %%i in ('wmic /output:stdout datafile where "name='%wufuc_dll:\=\\%'" get Version /value ^| find "="') do set "%%i"
@@ -72,7 +73,9 @@ title wufuc installer - v%Version%
 
 set "wufuc_xml=%~dp0wufuc.xml"
 
-if not exist "%wufuc_xml%" (
+if exist "%wufuc_xml%" (
+    goto :check_ver
+)
 echo ERROR - Could not find %wufuc_xml%!
 echo.
 echo This most likely means you didn't extract all the files from the archive.
@@ -80,7 +83,6 @@ if not exist "%wufuc_xml%" (
 echo Please extract all the files from wufuc_v%Version%.zip to a permanent
 echo location like C:\Program Files\wufuc and try again.
 goto :die
-)
 
 :check_ver
 ver | findstr " 6\.1\." >nul && (