compile error fixes

Author: RetiredWizard

shared-module/displayio/__init__.c

@@ -50,7 +50,7 @@
 
 // The default indicates no primary display
 static int primary_display_number = -1;
-static int max_num_displays = CIRCUITPY_DISPLAY_LIMIT;
+static mp_int_t max_num_displays = CIRCUITPY_DISPLAY_LIMIT;
 
 primary_display_bus_t display_buses[CIRCUITPY_DISPLAY_LIMIT];
 primary_display_t displays[CIRCUITPY_DISPLAY_LIMIT];

shared-module/displayio/__init__.h

@@ -110,9 +110,7 @@ extern displayio_group_t circuitpython_splash;
 
 void displayio_background(void);
 void reset_displays(void);
-#if CIRCUITPY_OS_GETENV
 void malloc_display_memory(void);
-#endif
 void displayio_gc_collect(void);
 
 primary_display_t *allocate_display(void);