Don't skip call lines searching for results
This fixes a bug noticed by Rick Frankel in which two subsequent
#+call: lines will both update the same results. Before this commit
both of the following call lines would update the same result.
#+name: call-me
#+BEGIN_SRC emacs-lisp :var v="nil"
v
#+END_SRC
#+call: call-me("one")
#+call: call-me(v="two")
#+RESULTS:
: one
Now both lines are given their own result.
#+name: call-me
#+BEGIN_SRC emacs-lisp :var v="nil"
v
#+END_SRC
#+call: call-me("one")
#+RESULTS:
: one
#+call: call-me(v="two")
#+RESULTS:
: two