Remove redundant checks

sway/commands/border.c

@@ -75,7 +75,7 @@ struct cmd_results *cmd_border(int argc, char **argv) {
 	} else if (strcmp(argv[0], "pixel") == 0) {
 		set_border(container, B_PIXEL);
 	} else if (strcmp(argv[0], "csd") == 0) {
-		if (!view || !view->xdg_decoration) {
+		if (!view->xdg_decoration) {
 			return cmd_results_new(CMD_INVALID,
 					"This window doesn't support client side decorations");
 		}

sway/commands/fullscreen.c

@@ -35,7 +35,7 @@ struct cmd_results *cmd_fullscreen(int argc, char **argv) {
 
 	bool is_fullscreen = false;
 	for (struct sway_container *curr = container; curr; curr = curr->parent) {
-		if (curr && curr->fullscreen_mode != FULLSCREEN_NONE) {
+		if (curr->fullscreen_mode != FULLSCREEN_NONE) {
 			container = curr;
 			is_fullscreen = true;
 			break;

sway/input/seatop_default.c

@@ -334,8 +334,7 @@ static void handle_button(struct sway_seat *seat, uint32_t time_msec,
 	if (cont && is_floating_or_child && !is_fullscreen_or_child &&
 			state == WLR_BUTTON_PRESSED) {
 		uint32_t btn_move = config->floating_mod_inverse ? BTN_RIGHT : BTN_LEFT;
-		if (button == btn_move && state == WLR_BUTTON_PRESSED &&
+		if (button == btn_move && (mod_pressed || on_titlebar)) {
-				(mod_pressed || on_titlebar)) {
 			while (cont->parent) {
 				cont = cont->parent;
 			}