Correct substatement indentation in c-mode (fixes #342)

modules/prelude-c.el

@@ -36,7 +36,8 @@
 
 (defun prelude-c-mode-common-defaults ()
   (setq indent-tabs-mode t)
-  (setq c-basic-offset 4))
+  (setq c-basic-offset 4)
+  (c-set-offset 'substatement-open 0))
 
 (setq prelude-c-mode-common-hook 'prelude-c-mode-common-defaults)