fix(include) remove unused stdio includes

examples/widgets/btn/lv_example_btn_2.c

@@ -1,5 +1,4 @@
 #include "../../lv_examples.h"
-#include <stdio.h>
 #if LV_USE_BTN && LV_BUILD_EXAMPLES
 
 /**

examples/widgets/btn/lv_example_btn_3.c

@@ -1,5 +1,4 @@
 #include "../../lv_examples.h"
-#include <stdio.h>
 #if LV_BUILD_EXAMPLES && LV_USE_BTN
 
 /**

src/core/lv_core.mk

@@ -9,6 +9,7 @@ CSRCS += lv_obj_pos.c
 CSRCS += lv_obj_scroll.c
 CSRCS += lv_obj_style.c
 CSRCS += lv_obj_tree.c
+CSRCS += lv_event.c
 CSRCS += lv_refr.c
 CSRCS += lv_theme.c
 

src/draw/lv_draw_line.c

@@ -6,7 +6,6 @@
 /*********************
  *      INCLUDES
  *********************/
-#include <stdio.h>
 #include <stdbool.h>
 #include "lv_draw_mask.h"
 #include "lv_draw_blend.h"

src/extra/widgets/colorwheel/lv_colorwheel.c

@@ -660,7 +660,7 @@ static lv_color_t angle_to_mode_color_fast(lv_obj_t * obj, uint16_t angle)
             fast_hsv2rgb(h, s, angle, &r, &g, &b);
             break;
     }
-    return LV_COLOR_MAKE(r, g, b);
+    return (lv_color_t)LV_COLOR_MAKE(r, g, b);
 }
 
 static uint16_t get_angle(lv_obj_t * obj)

src/misc/lv_math.c

@@ -8,8 +8,6 @@
  *********************/
 #include "lv_math.h"
 #include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
 
 /*********************
  *      DEFINES

src/misc/lv_tlsf.c

@@ -4,9 +4,6 @@
 #include <assert.h>
 #include <limits.h>
 #include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
 
 #include "lv_tlsf.h"
 
@@ -1265,7 +1262,7 @@ void* tlsf_realloc(tlsf_t tlsf, void* ptr, size_t size)
 			if (p)
 			{
 				const size_t minsize = tlsf_min(cursize, size);
-				memcpy(p, ptr, minsize);
+				lv_memcpy(p, ptr, minsize);
 				tlsf_free(tlsf, ptr);
 			}
 		}

src/widgets/lv_bar.c

@@ -13,7 +13,6 @@
 #include "../draw/lv_draw.h"
 #include "../misc/lv_anim.h"
 #include "../misc/lv_math.h"
-#include <stdio.h>
 
 /*********************
  *      DEFINES

src/widgets/lv_canvas.c

@@ -6,7 +6,6 @@
 /*********************
  *      INCLUDES
  *********************/
-#include <stdlib.h>
 #include "lv_canvas.h"
 #include "../misc/lv_assert.h"
 #include "../misc/lv_math.h"