x86 builds on Windows are warning level 1 clean (GH-16170)

The only issue that was left was due to the old build of net-snmp 5.7.3; since updating to net-snmp 5.9.4, this is resolved.

The patch has originally been provided by @mvorisek.

Author: cmb69

.github/scripts/windows/build_task.bat

@@ -31,12 +31,7 @@ if %errorlevel% neq 0 exit /b 3
 if "%THREAD_SAFE%" equ "0" set ADD_CONF=%ADD_CONF% --disable-zts
 if "%INTRINSICS%" neq "" set ADD_CONF=%ADD_CONF% --enable-native-intrinsics=%INTRINSICS%
 
-rem Some undefined behavior is reported on 32-bit, this should be fixed
-if "%PLATFORM%" == "x86" (
-	set CFLAGS=/W1
-) else (
-	set CFLAGS=/W1 /WX
-)
+set CFLAGS=/W1 /WX
 
 cmd /c configure.bat ^
 	--enable-snapshot-build ^