winbuild: Use two space indentation

Closes #3930

winbuild/gen_resp_file.bat

@@ -22,7 +22,7 @@ rem *
 rem ***************************************************************************
 
 if exist %OUTFILE% (
-    del %OUTFILE%
+  del %OUTFILE%
 )
 
 echo %MACRO_NAME% = \> %OUTFILE%

winbuild/makedebug.cmd

@@ -24,10 +24,11 @@ rem ***************************************************************************
 where.exe nmake.exe >nul 2>&1
 
 IF %ERRORLEVEL% == 1 (
-    ECHO Error: Can't find `nmake.exe` - be sure to run this script from within a Developer Command-Prompt
-    ECHO.
+  ECHO Error: Can't find `nmake.exe` - be sure to run this script from within a Developer Command-Prompt
+  ECHO.
 ) ELSE (
-    nmake /f Makefile.vc mode=static DEBUG=yes GEN_PDB=yes 
-    IF %ERRORLEVEL% NEQ 0 (ECHO "Error: Build Failed")
+  nmake /f Makefile.vc mode=static DEBUG=yes GEN_PDB=yes 
+  IF %ERRORLEVEL% NEQ 0 (
+    ECHO "Error: Build Failed"
+  )
 )
-