[llvm-objdump] Migrate some functions from std::error_code to Error

llvm-svn: 357965
diff --git a/llvm/tools/llvm-objdump/MachODump.cpp b/llvm/tools/llvm-objdump/MachODump.cpp
index 23dc18f..bbee17b 100644
--- a/llvm/tools/llvm-objdump/MachODump.cpp
+++ b/llvm/tools/llvm-objdump/MachODump.cpp
@@ -362,14 +362,12 @@
     // If we couldn't find a symbol that this relocation refers to, try
     // to find a section beginning instead.
     for (const SectionRef &Section : ToolSectionFilter(*O)) {
-      std::error_code ec;
-
       StringRef Name;
       uint64_t Addr = Section.getAddress();
       if (Addr != Val)
         continue;
-      if ((ec = Section.getName(Name)))
-        report_error(O->getFileName(), ec);
+      if (std::error_code EC = Section.getName(Name))
+        report_error(errorCodeToError(EC), O->getFileName());
       Fmt << Name;
       return;
     }