use macro for EXTERN "C" begin and end lines in header files to clean up the headers, and to eliminate a format bug in emacs.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1291 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch.h

@@ -35,9 +35,15 @@
 #ifndef SWITCH_H
 #define SWITCH_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#ifdef __cplusplus
+#define BEGIN_EXTERN_C       extern "C" {
+#define END_EXTERN_C         }
+#else
+#define BEGIN_EXTERN_C
+#define END_EXTERN_C
+#endif
+
+BEGIN_EXTERN_C
 
 //Need to include this before any other includes (MSVC Bug)
 #include <switch_platform.h>
@@ -69,9 +75,8 @@ extern "C" {
 #include <switch_stun.h>
 #include <switch_stun.h>
 #include <switch_log.h>
-#ifdef __cplusplus
-}
-#endif
+
+END_EXTERN_C
 
 /** \mainpage FreeSWITCH
  * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application