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I'm using XCreateImage with a bitmap of depth of 24 bits, the bitmap is stored into an unsigned int array:

buffer = malloc(width*height*sizeof(unsigned int));
Then I create and XImage like this:
XImage* image = XCreateImage(display, DefaultVisual(display, 0), 24, ZPixmap, 0, buffer, width, height, 32, 0);
It's working, however I get this warning when compiling:
/usr/include/X11/Xlib.h:1441:16: note: expected ‘char *’ but argument is of type ‘unsigned int *’
extern XImage *XCreateImage(
Can I just cast the buffer to a char* without any problem?
According to XCreateImage(3) the function definition is
   XImage *XCreateImage(Display *display, Visual *visual, unsigned int depth,  int  for‐
          mat, int offset, char *data, unsigned int width, unsigned int height, int bit‐
          map_pad, int bytes_per_line);
buffer is of type int * so you should cast it to char * like this
XImage* image = XCreateImage(display, DefaultVisual(display, 0), 24, ZPixmap, 0, (char *)buffer, width, height, 32, 0);
        
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