Fix ARM bustage caused by bug 555255. r=me.

--HG--
extra : convert_revision : fd2a6c5b65a0f4fd4e09fa0366a626e97850f39b

js/src/nanojit/NativeARM.cpp

@@ -1270,6 +1270,7 @@ Assembler::asm_restore(LInsp i, Register r)
         case LIR_andi: asm_and_imm(r, rn, imm, /*stat=*/ 0); break;
         case LIR_ori:  asm_orr_imm(r, rn, imm, /*stat=*/ 0); break;
         case LIR_xori: asm_eor_imm(r, rn, imm, /*stat=*/ 0); break;
+        default:       NanoAssert(0);                        break;
         }
     } else {
         // We can't easily load immediate values directly into FP registers, so