Added love.touch.getPressure(touchid). Not useful on most touch-capable devices, but I do expect Apple's Force Touch to make it into iPhones in the near future.

src/modules/touch/wrap_Touch.h

@@ -24,14 +24,17 @@
 // LOVE
 #include "Touch.h"
 #include "common/runtime.h"
+#include "common/int.h"
 
 namespace love
 {
 namespace touch
 {
 
+int64 luax_checktouchid(lua_State *L, int idx);
 int w_getIDs(lua_State *L);
 int w_getPosition(lua_State *L);
+int w_getPressure(lua_State *L);
 extern "C" LOVE_EXPORT int luaopen_love_touch(lua_State *L);
 
 } // touch