Add AIStateMachine::mSMDebug

The patch is exclusively libcwd related.

Turns off output from statemachines to dc::statemachine by default.
Allows to turn on the debug output on a per statemachine basis (at
compile time).

indra/cwdebug/debug.h

@@ -144,6 +144,7 @@ extern LL_COMMON_API fake_channel const snapshot;
 #define CWDEBUG_MARKER 0
 
 #define BACKTRACE do { } while(0)
+#define CWD_ONLY(...)
 
 #endif // !DOXYGEN
 
@@ -180,6 +181,7 @@ extern LL_COMMON_API fake_channel const snapshot;
 #include <set>
 
 #define CWD_API __attribute__ ((visibility("default")))
+#define CWD_ONLY(...) __VA_ARGS__
 
 //! Debug specific code.
 namespace debug {