Add parentheses to silence clang warning

src/common/dwarf_cu_to_module.cc

 // Copyright (c) 2010 Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 399 matching lines @@
     return_value = *qualified_name;
   } else if (unqualified_name && enclosing_name) {
     // Combine the enclosing name and unqualified name to produce our
     // own fully-qualified name.
     return_value = cu_context_->language->MakeQualifiedName(*enclosing_name,
                                                             *unqualified_name);
   }
 
   // If this DIE was marked as a declaration, record its names in the
   // specification table.
-  if (declaration_ && qualified_name || (unqualified_name && enclosing_name)) {
+  if ((declaration_ && qualified_name) ||
+      (unqualified_name && enclosing_name)) {
     Specification spec;
     if (qualified_name) {
       spec.qualified_name = *qualified_name;
     } else {
       spec.enclosing_name = *enclosing_name;
       spec.unqualified_name = *unqualified_name;
     }
     cu_context_->file_context->file_private_->specifications[offset_] = spec;
   }
 
@@ skipping 634 matching lines @@
   return dwarf_version >= 2;
 }
 
 bool DwarfCUToModule::StartRootDIE(uint64 offset, enum DwarfTag tag) {
   // We don't deal with partial compilation units (the only other tag
   // likely to be used for root DIE).
   return tag == dwarf2reader::DW_TAG_compile_unit;
 }
 
 } // namespace google_breakpad