Properly free return value of opendir() on calculation interrupt

When interrupinting the calculation process by pressing 'q' while
it's looping through a directory, or when a directory could be openend
but not chdir()'ed into, closedir() wasn't called.

ChangeLog

@@ -3,6 +3,7 @@ git - ?
   - Properly select the next item after deletion
 	- Removed reliance of dirfd()
 	- Fixed non-void return in void delete_process()
+	- Fixed several tiny memory leaks
 
 1.5 - 2009-05-02
 	- Fixed incorrect apparent size on directory refresh

src/calc.c

@@ -177,6 +177,8 @@ int calc_dir(struct dir *dest, char *name) {
     while((t = t->parent) != NULL)
       t->flags |= FF_SERR;
     calc_leavepath();
+    if(dir != NULL)
+      closedir(dir);
     return 0;
   }
 
@@ -187,6 +189,7 @@ int calc_dir(struct dir *dest, char *name) {
       dest->flags |= FF_ERR;
     if(input_handle(1)) {
       calc_leavepath();
+      closedir(dir);
       return 1;
     }
     calc_leavepath();