ports-gcc fix for:
error: invalid operands of types '__gnu_cxx::__enable_if<true, double>::__type {aka double}' and 'int' to binary 'operator>>'
From:
https://sourceforge.net/p/desmume/bugs/1570/

Index: src/ctrlssdl.cpp
--- src/ctrlssdl.cpp.orig
+++ src/ctrlssdl.cpp
@@ -200,7 +200,7 @@ u16 get_joy_key(int index) {
           break;
         case SDL_JOYAXISMOTION:
           /* Dead zone of 50% */
-          if( (abs(event.jaxis.value) >> 14) != 0 )
+          if( ((u32)abs(event.jaxis.value) >> 14) != 0 )
             {
               key = ((event.jaxis.which & 15) << 12) | JOY_AXIS << 8 | ((event.jaxis.axis & 127) << 1);
               if (event.jaxis.value > 0) {
@@ -370,7 +370,7 @@ do_process_joystick_events( u16 *keypad, SDL_Event *ev
          Note: button constants have a 1bit offset. */
     case SDL_JOYAXISMOTION:
       key_code = ((event->jaxis.which & 15) << 12) | JOY_AXIS << 8 | ((event->jaxis.axis & 127) << 1);
-      if( (abs(event->jaxis.value) >> 14) != 0 )
+      if( ((u32)abs(event->jaxis.value) >> 14) != 0 )
         {
           if (event->jaxis.value > 0)
             key_code |= 1;