Fix Visual Studio compile error in C++ wrappers due to #include <exception> within extern "C" block.

Fixes SF #1340

CHANGES.current

@@ -5,6 +5,10 @@ See the RELEASENOTES file for a summary of changes in each release.
 Version 2.0.12 (9 Feb 2014)
 ===========================
 
+2013-10-17: wsfulton
+            [R] Fix SF #1340 - Visual Studio compile error in C++ wrappers due to #include <exception>
+            within extern "C" block.
+
 2013-10-17: wsfulton
             [Python] Fix SF #1345 - Missing #include <stddef.h> for offsetof when using -builtin.
 

Lib/r/rrun.swg

@@ -1,5 +1,6 @@
 
 #ifdef __cplusplus
+#include <exception>
 extern "C" {
 #endif
 
@@ -369,7 +370,6 @@ SWIG_R_ConvertPacked(SEXP obj, void *ptr, size_t sz, swig_type_info *ty) {
 }  
 
 #ifdef __cplusplus
-#include <exception>
 #define SWIG_exception_noreturn(code, msg) do { throw std::runtime_error(msg); } while(0)
 #else
 #define SWIG_exception_noreturn(code, msg) do { return result; } while(0)