[binutils] NFC: fix clang-tidy warning: use empty() instead of size() == 0

llvm-svn: 349710
diff --git a/llvm/tools/llvm-cov/CodeCoverage.cpp b/llvm/tools/llvm-cov/CodeCoverage.cpp
index 1dc6eed..728e00e 100644
--- a/llvm/tools/llvm-cov/CodeCoverage.cpp
+++ b/llvm/tools/llvm-cov/CodeCoverage.cpp
@@ -691,7 +691,7 @@
       PathRemapping = EquivPair;
 
     // If a demangler is supplied, check if it exists and register it.
-    if (DemanglerOpts.size()) {
+    if (!DemanglerOpts.empty()) {
       auto DemanglerPathOrErr = sys::findProgramByName(DemanglerOpts[0]);
       if (!DemanglerPathOrErr) {
         error("Could not find the demangler!",