Use default SectionDescriptor constructor.

Makes it easier to write tests.

Tested: Unit tests
Google-Bug-Id: 322561358
Change-Id: I2bd16915cb61b29c24519d313400ce8f82a90b95
Signed-off-by: Aryk Ledet <arykledet@google.com>
diff --git a/include/cper.hpp b/include/cper.hpp
index 0ac94d7..8f0bbd9 100644
--- a/include/cper.hpp
+++ b/include/cper.hpp
@@ -230,8 +230,7 @@
     uint32_t sectionSeverity;
     std::array<uint8_t, 20> fruText;
 
-    SectionDescriptor()
-    {}
+    SectionDescriptor() = default;
 
     SectionDescriptor(const uint32_t sectionOffsetIn,
                       const uint32_t sectionLengthIn, const uint16_t revisionIn,