silence another unnecessary warning in msvc.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@664 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_platform.h

@@ -46,8 +46,9 @@ extern "C" {
  * C4142: A type is redefined in a manner that has no effect on the generated code.
  * C4200: Non standard extension C zero sized array
  * C4204: nonstandard extension used : non-constant aggregate initializer 
+ * C4706: assignment within conditional expression
  */
-#pragma warning(disable:4152 4054 4100 4142 4200 4204)
+#pragma warning(disable:4152 4054 4100 4142 4200 4204 4706)
 
 #if (_MSC_VER >= 1400) // VC8+
 #ifndef _CRT_SECURE_NO_DEPRECATE