[RFA] mips-tdep.c: Fix inferior function call breakage

[Kevin Buettner <kevinb@redhat.com>]

Without the following patch in place, I've found that inferior function
calls are badly broken for the mips linux targets that I've been testing.
(The warning in heuristic_proc_start() is tripped and things degrade quickly
from there...)

Okay?

	* mips-tdep.c (find_proc_desc): Return early if in a dummy frame.

Index: mips-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mips-tdep.c,v
retrieving revision 1.160
diff -u -p -r1.160 mips-tdep.c
--- mips-tdep.c	19 Jan 2003 04:06:46 -0000	1.160
+++ mips-tdep.c	23 Jan 2003 07:20:26 -0000
@@ -2350,6 +2350,9 @@ find_proc_desc (CORE_ADDR pc, struct fra
   mips_extra_func_info_t proc_desc;
   CORE_ADDR startaddr = 0;
 
+  if (pc_in_dummy_frame (pc))
+    return NULL;
+
   proc_desc = non_heuristic_proc_desc (pc, &startaddr);
 
   if (proc_desc)