Initial commit of handling of onPause()

onPause() is called on ICS when the back button is pressed before the task lists
is shown. With this commit, opentyrian pauses an ongoing level and waits for a key
before continuing it.

It does however not silence the music, which may be desirable as well
(to be added with the next commit)

project/jni/application/opentyrian/src/keyboard.cpp

@@ -16,6 +16,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
+#include "config.h"
 #include "joystick.h"
 #include "keyboard.h"
 #include "network.h"
@@ -128,6 +129,10 @@ void set_mouse_position( int x, int y )
 	}
 }
 
+JE_boolean handle_pause_key = true;
+
+void JE_pauseGame( void );
+
 void service_SDL_events( JE_boolean clear_new )
 {
 	SDL_Event ev;
@@ -144,6 +149,14 @@ void service_SDL_events( JE_boolean clear_new )
 				mouse_y = ev.motion.y * vga_height / scalers[scaler].height;
 				break;
 			case SDL_KEYDOWN:
+				if (handle_pause_key && ev.key.keysym.sym == SDLK_PAUSE)
+				{
+					JE_boolean superPause_save = superPause;
+					superPause = true;
+					JE_pauseGame();
+					superPause = superPause_save;
+					break;
+				}
 				if (ev.key.keysym.mod & KMOD_CTRL)
 				{
 					/* <ctrl><bksp> emergency kill */