tweak macro for clean build on msvc.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4110 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_utils.h

@@ -50,7 +50,7 @@ SWITCH_BEGIN_EXTERN_C
 #define vsnprintf apr_vsnprintf
 #endif
 
-#define switch_bytes_per_frame(rate, interval) (uint32_t)((float)rate / (1000.0f / (float)interval));
+#define switch_bytes_per_frame(rate, interval) ((uint32_t)((float)rate / (1000.0f / (float)interval)))
 
 #define SWITCH_SMAX 32767
 #define SWITCH_SMIN -32768