new round of warning fixes. we are now down to 24 with Xcode on blender

alone with the following flags :
-Wall -Wno-char-subscripts -Wno-missing-braces.

the only one still worrying me is in rand.c line 57 :

rand.c:57: integer constant is too large for "long" type

but i have no clue about how correct cross-compiler and 32/64 bits friendly

see also my mail to commiter list for signed/unsigned issues

source/blender/python/BPY_interface.c

@@ -115,6 +115,9 @@ int BPY_txt_do_python_Text( struct Text *text );
 void BPY_Err_Handle( char *script_name );
 PyObject *traceback_getFilename( PyObject * tb );
 
+void BPY_free_screen_spacehandlers(struct bScreen *sc);
+
+
 /****************************************************************************
 * Description: This function will initialise Python and all the implemented 
 *	          api variations.