A few scaling fixes for X11 mode...

- getscaling() incorrectly used an int intermediate variable
  This would force scaling to an integer value when read.
- Only parse ConfigureNotify events describing a change to the SyncTERM window
  It appears that XWayland on ChromeOS was occasionally sending a
  ConfigureNotify event describing some other window to SyncTERM,
  and that window had a 1x1 size, which would cause SyncTERM to
  assert minimum size again (usually 640x480), which would set
  scaling to 1.0.

src/conio/x_cio.c

@@ -554,7 +554,7 @@ void x_setscaling(double newval)
 
 double x_getscaling(void)
 {
-	int ret;
+	double ret;
 
 	pthread_mutex_lock(&vstatlock);
 	ret = vstat.scaling;

src/conio/x_events.c

@@ -481,14 +481,16 @@ static void resize_window()
 	pthread_mutex_lock(&vstatlock);
 	bitmap_get_scaled_win_size(x_cvstat.scaling, &width, &height, 0, 0);
 	if (width == vstat.winwidth && height == vstat.winheight) {
-		vstat.scaling = x_cvstat.scaling = bitmap_double_mult_inside(width, height);
+		x_cvstat.scaling = bitmap_double_mult_inside(width, height);
+		vstat.scaling = x_cvstat.scaling;
 		pthread_mutex_unlock(&vstatlock);
 		resize_xim();
 		return;
 	}
 	x_cvstat.winwidth = vstat.winwidth;
 	x_cvstat.winheight = vstat.winheight;
-	vstat.scaling = x_cvstat.scaling = bitmap_double_mult_inside(width, height);
+	x_cvstat.scaling = bitmap_double_mult_inside(width, height);
+	vstat.scaling = x_cvstat.scaling;
 	pthread_mutex_unlock(&vstatlock);
 	x11.XResizeWindow(dpy, win, width, height);
 	resize_xim();
@@ -859,16 +861,21 @@ static int x11_event(XEvent *ev)
 		case ConfigureNotify: {
 			bool resize = false;
 
+			if (ev->xconfigure.window == win) {
 				if (x11_window_xpos != ev->xconfigure.x || x11_window_ypos != ev->xconfigure.y) {
 					x11_window_xpos=ev->xconfigure.x;
 					x11_window_ypos=ev->xconfigure.y;
 				}
 				pthread_mutex_lock(&vstatlock);
-			if (ev->xconfigure.width != vstat.winwidth || ev->xconfigure.height != vstat.winheight)
+				if (ev->xconfigure.width != vstat.winwidth || ev->xconfigure.height != vstat.winheight) {
+					// XWayland on ChromeOS appears to send a 1x1 resize event early on for unknown reasons... inore it.
+					if (ev->xconfigure.width != 1 && ev->xconfigure.height != 1)
 						resize = true;
+				}
 				pthread_mutex_unlock(&vstatlock);
 				if (resize)
 					handle_resize_event(ev->xconfigure.width, ev->xconfigure.height);
+			}
 			break;
 		}
 		case NoExpose:

src/syncterm/syncterm.c

@@ -1938,7 +1938,7 @@ main(int argc, char **argv)
 	if ((txtinfo.currmode == screen_to_ciolib(settings.startup_mode))
 	    || ((settings.startup_mode == SCREEN_MODE_CURRENT) && (txtinfo.currmode == C80))) {
 		sf = getscaling();
-		if (((sf > 0) && (sf != settings.scaling_factor))) {
+		if (((sf > 0.0) && (sf != settings.scaling_factor))) {
 			char       inipath[MAX_PATH + 1];
 			FILE      *inifile;
 			str_list_t inicontents;
@@ -1951,8 +1951,9 @@ main(int argc, char **argv)
 			else {
 				inicontents = strListInit();
 			}
-			if ((sf > 0) && (sf != settings.scaling_factor))
+			if ((sf > 0.0) && (sf != settings.scaling_factor)) {
 				iniSetFloat(&inicontents, "SyncTERM", "ScalingFactor", sf, &ini_style);
+			}
 			if ((inifile = fopen(inipath, "w")) != NULL) {
 				iniWriteFile(inifile, inicontents);
 				fclose(inifile);