Fix bug in ARM pixel array clamping

src/arm/lithium-codegen-arm.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4052 matching lines @@
 
   // Check for heap number
   __ ldr(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset));
   __ cmp(scratch, Operand(factory()->heap_number_map()));
   __ b(eq, &heap_number);
 
   // Check for undefined. Undefined is converted to zero for clamping
   // conversions.
   __ cmp(input_reg, Operand(factory()->undefined_value()));
   DeoptimizeIf(ne, instr->environment());
-  __ movt(input_reg, 0);
+  __ mov(result_reg, Operand(0));
   __ jmp(&done);
 
   // Heap number
   __ bind(&heap_number);
   __ vldr(double_scratch0(), FieldMemOperand(input_reg,
                                              HeapNumber::kValueOffset));
   __ ClampDoubleToUint8(result_reg, double_scratch0(), temp_reg);
   __ jmp(&done);
 
   // smi
@@ skipping 401 matching lines @@
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 
 
 
 #undef __
 
 } }  // namespace v8::internal