message: Fix some signed/unsigned comparison warnings
diff: @@ -118,16 +118,16 @@ TEST_F(SymbolFileDWARFTests, TestAbbrevOrder1Start1) {
  EXPECT_FALSE(bool(error));
  // Make sure we have O(1) access to each abbreviation by making sure the
  // index offset is 1 and not UINT32_MAX
  - EXPECT_EQ(abbrev_set.GetIndexOffset(), 1);
  + EXPECT_EQ(abbrev_set.GetIndexOffset(), 1u);
  auto abbrev1 = abbrev_set.GetAbbreviationDeclaration(1);
  EXPECT_EQ(abbrev1->Tag(), DW_TAG_compile_unit);
  EXPECT_TRUE(abbrev1->HasChildren());
  - EXPECT_EQ(abbrev1->NumAttributes(), 1);
  + EXPECT_EQ(abbrev1->NumAttributes(), 1u);
  auto abbrev2 = abbrev_set.GetAbbreviationDeclaration(2);
  EXPECT_EQ(abbrev2->Tag(), DW_TAG_subprogram);
  EXPECT_FALSE(abbrev2->HasChildren());
  - EXPECT_EQ(abbrev2->NumAttributes(), 1);
  + EXPECT_EQ(abbrev2->NumAttributes(), 1u);
  }
  TEST_F(SymbolFileDWARFTests, TestAbbrevOrder1Start5) {
  @@ -163,16 +163,16 @@ TEST_F(SymbolFileDWARFTests, TestAbbrevOrder1Start5) {
  EXPECT_FALSE(bool(error));
  // Make sure we have O(1) access to each abbreviation by making sure the
  // index offset is 5 and not UINT32_MAX
  - EXPECT_EQ(abbrev_set.GetIndexOffset(), 5);
  + EXPECT_EQ(abbrev_set.GetIndexOffset(), 5u);
  auto abbrev1 = abbrev_set.GetAbbreviationDeclaration(5);
  EXPECT_EQ(abbrev1->Tag(), DW_TAG_compile_unit);
  EXPECT_TRUE(abbrev1->HasChildren());
  - EXPECT_EQ(abbrev1->NumAttributes(), 1);
  + EXPECT_EQ(abbrev1->NumAttributes(), 1u);
  auto abbrev2 = abbrev_set.GetAbbreviationDeclaration(6);
  EXPECT_EQ(abbrev2->Tag(), DW_TAG_subprogram);
  EXPECT_FALSE(abbrev2->HasChildren());
  - EXPECT_EQ(abbrev2->NumAttributes(), 1);
  + EXPECT_EQ(abbrev2->NumAttributes(), 1u);
  }
  TEST_F(SymbolFileDWARFTests, TestAbbrevOutOfOrder) {
  @@ -213,11 +213,11 @@ TEST_F(SymbolFileDWARFTests, TestAbbrevOutOfOrder) {
  auto abbrev1 = abbrev_set.GetAbbreviationDeclaration(2);
  EXPECT_EQ(abbrev1->Tag(), DW_TAG_compile_unit);
  EXPECT_TRUE(abbrev1->HasChildren());
  - EXPECT_EQ(abbrev1->NumAttributes(), 1);
  + EXPECT_EQ(abbrev1->NumAttributes(), 1u);
  auto abbrev2 = abbrev_set.GetAbbreviationDeclaration(1);
  EXPECT_EQ(abbrev2->Tag(), DW_TAG_subprogram);
  EXPECT_FALSE(abbrev2->HasChildren());
  - EXPECT_EQ(abbrev2->NumAttributes(), 1);
  + EXPECT_EQ(abbrev2->NumAttributes(), 1u);
  }
  TEST_F(SymbolFileDWARFTests, TestAbbrevInvalidNULLTag) {
  