[llvm-symbolizer] Simplify

llvm-svn: 333334
diff --git a/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp b/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
index 1255e74..6d40a54 100644
--- a/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
+++ b/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
@@ -113,7 +113,7 @@
   }
   const char *pos = InputString.data();
   // Skip delimiters and parse input filename (if needed).
-  if (ClBinaryName == "") {
+  if (ClBinaryName.empty()) {
     pos += strspn(pos, kDelimiters);
     if (*pos == '"' || *pos == '\'') {
       char quote = *pos;