Fixed rpath() bug on /.

git-svn-id: svn://blicky.net/ncdu/trunk@47 ce56bc8d-f834-0410-b703-f827bd498a76

ChangeLog

@@ -4,6 +4,7 @@ svn - ?
 	- Current directory is assumed when no directory is specified
 	- Size graph uses the apparent size if that is displayed
 	- Items are ordered by displayed size rather than disk usage
+	- Fixed rpath() bug on '/.'
 
 1.4 - 2008-09-10
 	- Removed the startup window

src/calc.c

@@ -101,6 +101,11 @@ char *rpath(const char *from, char *to) {
       break;
   }
   to[j+1] = 0;
+ /* make sure we do have something left in case our path is / */
+  if(to[0] == 0) {
+    to[0] = '/';
+    to[1] = 0;
+  }
  /* append 'app' */
   if(app[0] != 0)
     strcat(to, app);