Remove tautological comparison in CellSpan::ensureConsistency

Source/core/layout/LayoutTableSection.cpp

Index: Source/core/layout/LayoutTableSection.cpp
diff --git a/Source/core/layout/LayoutTableSection.cpp b/Source/core/layout/LayoutTableSection.cpp
index f8e4c0b3927abd5e0178c2ee1c8cbc06a382e505..afb1424af20b17dd535baaf7b8b72eb90a7b5c23 100644
--- a/Source/core/layout/LayoutTableSection.cpp
+++ b/Source/core/layout/LayoutTableSection.cpp
@@ -80,8 +80,10 @@ row, const LayoutTableCell* cell)
 
 void CellSpan::ensureConsistency(const unsigned maximumSpanSize)
 {
-    RELEASE_ASSERT(m_start >= 0 && m_start <= maximumSpanSize);
-    RELEASE_ASSERT(m_end >= 0 && m_end <= maximumSpanSize);
+    static_assert(WTF::IsSameType<decltype(m_start), unsigned>::value, "Asserts below assume m_start is unsigned");
+    static_assert(WTF::IsSameType<decltype(m_end), unsigned>::value, "Asserts below assume m_end is unsigned");
+    RELEASE_ASSERT(m_start <= maximumSpanSize);
+    RELEASE_ASSERT(m_end <= maximumSpanSize);
     RELEASE_ASSERT(m_start <= m_end);
 }