Enable the CHECK for near-jump displacement range in Release mode too.

src/ia32/assembler-ia32.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 1355 matching lines @@
     }
     disp.next(L);
   }
   while (L->is_near_linked()) {
     int fixup_pos = L->near_link_pos();
     int offset_to_next =
         static_cast<int>(*reinterpret_cast<int8_t*>(addr_at(fixup_pos)));
     ASSERT(offset_to_next <= 0);
     // Relative address, relative to point after address.
     int disp = pos - fixup_pos - sizeof(int8_t);
-    ASSERT(0 <= disp && disp <= 127);
+    CHECK(0 <= disp && disp <= 127);
     set_byte_at(fixup_pos, disp);
     if (offset_to_next < 0) {
       L->link_to(fixup_pos + offset_to_next, Label::kNear);
     } else {
       L->UnuseNear();
     }
   }
   L->bind_to(pos);
 }
 
@@ skipping 1230 matching lines @@
     fprintf(coverage_log, "%s\n", file_line);
     fflush(coverage_log);
   }
 }
 
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32