message: Fix PE available sections space
diff: @@ -81,7 +81,7 @@ Binary::Binary(void) :
  rich_header_{},
  header_{},
  optional_header_{},
  - available_sections_space_{0},
  + available_sections_space_{0xc}, // (0x400 - 0x1f8) / sizeof(IMAGE_SECTION_HEADER)
  has_rich_header_{false},
  has_tls_{false},
  has_imports_{false},
  