Patch for libinterp/corefcn/jit-typeinfo.{cc,h}, Octave 3.8.0 build.

jit-typeinfo.diff

diff --git a/libinterp/corefcn/jit-typeinfo.cc b/libinterp/corefcn/jit-typeinfo.cc
index 77a3cf4..911f3b2 100644
--- a/libinterp/corefcn/jit-typeinfo.cc
+++ b/libinterp/corefcn/jit-typeinfo.cc
@@ -916,7 +916,7 @@ jit_operation::generate (const signature_vec&) const
 
 bool
 jit_operation::signature_cmp
-::operator() (const signature_vec *lhs, const signature_vec *rhs)
+::operator() (const signature_vec *lhs, const signature_vec *rhs) const
 {
   const signature_vec& l = *lhs;
   const signature_vec& r = *rhs;
diff --git a/libinterp/corefcn/jit-typeinfo.h b/libinterp/corefcn/jit-typeinfo.h
index 2799e68..95e7914 100644
--- a/libinterp/corefcn/jit-typeinfo.h
+++ b/libinterp/corefcn/jit-typeinfo.h
@@ -372,7 +372,7 @@ private:
 
   struct signature_cmp
   {
-    bool operator() (const signature_vec *lhs, const signature_vec *rhs);
+    bool operator() (const signature_vec *lhs, const signature_vec *rhs) const;
   };
 
   typedef std::map<const signature_vec *, jit_function *, signature_cmp>