patch 9.1.1584: using ints as boolean type

Problem:  using ints as bool
Solution: Include stdbool.h and start using bool type directly
          (Hirohito Higashi)

This is a test to see if using the boolean types cause any issues.
If this change causes issues on any platform, please reach out.

closes: #17830

Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: h-east

src/gui.c

@@ -396,7 +396,7 @@ gui_init_check(void)
 	return result;
     }
 
-    gui.shell_created = FALSE;
+    gui.shell_created = false;
     gui.dying = FALSE;
     gui.in_focus = TRUE;		// so the guicursor setting works
     gui.dragged_sb = SBAR_NONE;
@@ -717,7 +717,7 @@ gui_init(void)
     gui_init_which_components(NULL);
 
     // All components of the GUI have been created now
-    gui.shell_created = TRUE;
+    gui.shell_created = true;
 
 #ifdef FEAT_GUI_MSWIN
     // Set the shell size, adjusted for the screen size.  For GTK this only

src/gui.h

@@ -234,7 +234,7 @@ typedef struct Gui
     int		in_focus;	    // Vim has input focus
     int		in_use;		    // Is the GUI being used?
     int		starting;	    // GUI will start in a little while
-    int		shell_created;	    // Has the shell been created yet?
+    bool	shell_created;	    // Has the shell been created yet?
     int		dying;		    // Is vim dying? Then output to terminal
     int		dofork;		    // Use fork() when GUI is starting
 #ifdef GUI_MAY_SPAWN

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1584,
 /**/
     1583,
 /**/

src/vim.h

@@ -522,6 +522,7 @@ typedef long long vimlong_T;
 
 // for offsetof()
 #include <stddef.h>
+#include <stdbool.h>
 
 #if defined(HAVE_SYS_SELECT_H) && \
 	(!defined(HAVE_SYS_TIME_H) || defined(SYS_SELECT_WITH_SYS_TIME))