Fix ipwin does not build 64-bit application in windows 7

windows/ipwin/ipwin/build.bat

@@ -4,8 +4,9 @@ SETLOCAL
 SET VCVARSALL="C:\Program Files\Microsoft Visual Studio 9.0\VC\vcvarsall.bat"
 SET SETENV="C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\SetEnv.cmd"
 
-IF /I "%PROCESSOR_ARCHITECTURE%" == "x86" GOTO ARCH_X86 
+IF /I "%PROCESSOR_ARCHITEW6432%" == "AMD64" GOTO ARCH_AMD64
 IF /I "%PROCESSOR_ARCHITECTURE%" == "AMD64" GOTO ARCH_AMD64
+IF /I "%PROCESSOR_ARCHITECTURE%" == "x86" GOTO ARCH_X86
 
 ECHO.
 ECHO Failed to build, unknown architecture: %PROCESSOR_ARCHITECTURE%
@@ -13,8 +14,8 @@ ECHO.
 GOTO END
 
 :ARCH_X86
-IF EXIST %VCVARSALL%. (    
-   CALL %VCVARSALL% 
+IF EXIST %VCVARSALL%. (
+   CALL %VCVARSALL%
    cl /D"UNICODE" /D"_UNICODE" ipwin.cpp netcfg.cpp setupapi.lib iphlpapi.lib advapi32.lib
    GOTO END )
 
@@ -27,10 +28,10 @@ ECHO.
 GOTO END
 
 :ARCH_AMD64
-IF EXIST %SETENV%. ( 
+IF EXIST %SETENV%. (
    SETLOCAL ENABLEDELAYEDEXPANSION
    SETLOCAL ENABLEDELAYEDEXPANSION
-   CALL %SETENV% 
+   CALL %SETENV%
    cl /D"UNICODE" /D"_UNICODE" ipwin.cpp netcfg.cpp setupapi.lib iphlpapi.lib advapi32.lib
    GOTO END )