[LLDB][NFC] Fix possible resource leak

[fixathon]

Summary

SymbolVendorPECOFF object is leaked on early return at line 110

lldb/source/Plugins/SymbolVendor/PECOFF/SymbolVendorPECOFF.cpp

ObjectFileSP dsym_objfile_sp = ObjectFile::FindPlugin(
       module_sp, &dsym_fspec, 0, FileSystem::Instance().GetByteSize(dsym_fspec),
       dsym_file_data_sp, dsym_file_data_offset);
   if (!dsym_objfile_sp)
     return nullptr;
 
   // This objfile is for debugging purposes.
   dsym_objfile_sp->SetType(ObjectFile::eTypeDebugInfo);
 
-  SymbolVendorPECOFF *symbol_vendor = new SymbolVendorPECOFF(module_sp);
-
   // Get the module unified section list and add our debug sections to
   // that.
   SectionList *module_section_list = module_sp->GetSectionList();
   SectionList *objfile_section_list = dsym_objfile_sp->GetSectionList();
   if (!objfile_section_list || !module_section_list)
     return nullptr;
 
   static const SectionType g_sections[] = {
if (SectionSP section_sp =
               module_section_list->FindSectionByType(section_type, true))
         module_section_list->ReplaceSection(module_section_sp->GetID(),
                                             section_sp);
       else
         module_section_list->AddSection(section_sp);
     }
   }
 
+  SymbolVendorPECOFF *symbol_vendor = new SymbolVendorPECOFF(module_sp);
   symbol_vendor->AddSymbolFileRepresentation(dsym_objfile_sp);
   return symbol_vendor;
 }