Ensure that _full_name is set on all shared libs before extensions

are checked for shared lib usage.  (problem reported by Andi Vajda)
(backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4065963

setuptools/command/build_ext.py

@@ -107,7 +107,9 @@ class build_ext(_build_ext):
         if self.shlibs:
             self.setup_shlib_compiler()
         for ext in self.extensions:
-            fullname = ext._full_name = self.get_ext_fullname(ext.name)
+            ext._full_name = self.get_ext_fullname(ext.name)
+        for ext in self.extensions:
+            fullname = ext._full_name
             self.ext_map[fullname] = ext
             ltd = ext._links_to_dynamic = \
                 self.shlibs and self.links_to_dynamic(ext) or False
@@ -119,8 +121,6 @@ class build_ext(_build_ext):
             if ltd and use_stubs and os.curdir not in ext.runtime_library_dirs:
                 ext.runtime_library_dirs.append(os.curdir)
 
-
-
     def setup_shlib_compiler(self):
         compiler = self.shlib_compiler = new_compiler(
             compiler=self.compiler, dry_run=self.dry_run, force=self.force