[NOBIN] Fixed appveyor config to build 32-bit version

Author: hasherezade

.appveyor.yml

@@ -29,7 +29,7 @@ before_build:
   - if [%env_arch%]==[x64] (
     cmake .. -A x64 )
   - if [%env_arch%]==[x86] (
-    cmake .. )
+    cmake .. -A Win32 )
   - cmake -DCMAKE_INSTALL_PREFIX:PATH=%APPVEYOR_BUILD_FOLDER%/%APPVEYOR_REPO_COMMIT% ..
 
 build_script: