(wx) get the wxWidgets port building again. :)

libtransmission/utils.h

@@ -31,6 +31,10 @@
 #include <stdio.h> /* FILE* */
 #include <time.h> /* time_t* */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /***
 ****
 ***/
@@ -280,4 +284,8 @@ tr_bitfield* tr_bitfieldOr( tr_bitfield*, const tr_bitfield* );
 
 double tr_getRatio( double numerator, double denominator );
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif