Fix z80-coff build breakage

[Alan Modra]

Mainline gcc complains.

	* config/tc-z80.c (parse_exp_not_indexed, parse_exp): Warning fixes.

diff --git a/gas/config/tc-z80.c b/gas/config/tc-z80.c
index 54fa322..a602dc7 100644
--- a/gas/config/tc-z80.c
+++ b/gas/config/tc-z80.c
@@ -557,6 +557,8 @@ parse_exp_not_indexed (const char *s, expressionS *op)
     case O_illegal:
       error (_("bad expression syntax"));
       break;
+    default:
+      break;
     }
   return input_line_pointer;
 }
@@ -604,6 +606,8 @@ parse_exp (const char *s, expressionS *op)
 	  op->X_op = O_md1;
 	}
 	break;
+    default:
+      break;
     }
   return res;
 }

-- 
Alan Modra
Australia Development Lab, IBM