* make sure we link against proper openmp library when using msvc

* return error code from makensis process instead of 0

tools/Blender.py

@@ -165,6 +165,9 @@ def setup_syslibs(lenv):
         if not lenv['WITH_BF_STATICOPENAL']:
             syslibs += Split(lenv['BF_OPENAL_LIB'])
     if lenv['WITH_BF_OPENMP'] and lenv['CC'] != 'icc':
+        if lenv['CC'] == 'cl.exe':
+            syslibs += ['vcomp']
+        else:
             syslibs += ['gomp']
     if lenv['WITH_BF_ICONV']:
         syslibs += Split(lenv['BF_ICONV_LIB'])

tools/btools.py

@@ -531,5 +531,5 @@ def NSIS_Installer(target=None, source=None, env=None):
     data, err = proc.communicate()
     rv = proc.wait()
 
-    return 0
+    return err