fixed image previews sticking around longer than expected

file_previews.c

@@ -129,4 +129,8 @@ void ueberzug_init(){
 	ueberzug = popen("ueberzug layer -s --no-cache ", "w");
 	#endif
 }
+void ueberzug_close(){
+	images_clear();
+	pclose(ueberzug);
+}
 #endif

file_previews.h

@@ -1,9 +1,13 @@
 #ifndef PREVIEW_GUARD
 #define PREVIEW_GUARD
 #include "file_previews.c"
+#include "config.h"
 #endif
 
 char* preview_file(char *file_name, unsigned long file_size);
 char* get_mimetype(char *path);
 void images_clear();
 void ueberzug_init();
+#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
+void ueberzug_close();
+#endif

interactions.c

@@ -343,6 +343,10 @@ void open_with(){
 		cmd = concat(cmd, mid_content[selected_file_current].file_name);
 		cmd = concat(cmd, "\"");
 
+		#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
+		images_clear();
+		#endif
+
 		if (system(cmd) == -1) {
 			FAIL("open_with", "creating subcommand failed unhandled");
 		}
@@ -523,6 +527,9 @@ void update(){
 void enter_shell(int passes, int index){
 	(void)passes;
 
+	#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
+	images_clear();
+	#endif
 	endwin();
 	if (system(key_binding[index].black_magic) != 0) {
 		/*do nothing*/

main.c

@@ -107,6 +107,9 @@ int main(){
 		#endif
 
 	}
+	#if SETTINGS_UEBERZUG_IMAGE_PREVIEW != 0
+	ueberzug_close();
+	#endif
 	threading_free();
 	free(start_path);