[patch] Missing UNOP_PLUS handler in c-lang.c

[Hafiz Abid Qadeer <hafiz_abid@mentor.com>]

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Hi All,
This patch fixes the problem shown in the session below. The fix was  
originally created by Pedro a few years ago. I have updated it with the  
current code and regtested it. Is it OK?


(gdb) set debug expression 1
(gdb) p +1
Dump of expression @ 0x8840908, before conversion to prefix form:
	Language c, 5 elements, 16 bytes each.
	Index                Opcode         Hex Value  String Value
	    0               OP_LONG  40  (...............
	    1   <unknown 142879800>  142879800  8,..............
	    2             BINOP_ADD  1  ................
	    3               OP_LONG  40  (...............
	    4             UNOP_PLUS  70  F...............
Dump of expression @ 0x8840908, after conversion to prefix form:
Expression: `Invalid expression

Regards,
Abid

gdb:

2013-02-12  Pedro Alves  <palves@redhat.com>
	    Hafiz Abid Qadeer  <abidh@codesourcery.com>

	* c-lang.c (c_op_print_tab): Add entry for UNOP_PLUS.

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diff --git a/gdb/c-lang.c b/gdb/c-lang.c
index 3a7d6f1..91cb21e 100644
--- a/gdb/c-lang.c
+++ b/gdb/c-lang.c
@@ -732,6 +732,7 @@ const struct op_print c_op_print_tab[] =
   {"/", BINOP_DIV, PREC_MUL, 0},
   {"%", BINOP_REM, PREC_MUL, 0},
   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
+  {"+", UNOP_PLUS, PREC_PREFIX, 0},
   {"-", UNOP_NEG, PREC_PREFIX, 0},
   {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
   {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},