file_util: return string by const reference for GetExeDirectory()

This disallows modifying the internal string buffer (which shouldn't be
modified anyhow).

2 files changed, 2 insertions, 2 deletions

diff --git a/src/common/file_util.cpp b/src/common/file_util.cpp
index bf955386c..c882ab39f 100644
--- a/src/common/file_util.cpp
+++ b/src/common/file_util.cpp
@@ -592,7 +592,7 @@ std::string GetBundleDirectory() {
 #endif
 
 #ifdef _WIN32
-std::string& GetExeDirectory() {
+const std::string& GetExeDirectory() {
     static std::string exe_path;
     if (exe_path.empty()) {
         wchar_t wchar_exe_path[2048];
diff --git a/src/common/file_util.h b/src/common/file_util.h
index 026c84d94..1f38b1560 100644
--- a/src/common/file_util.h
+++ b/src/common/file_util.h
@@ -133,7 +133,7 @@ std::string GetBundleDirectory();
 #endif
 
 #ifdef _WIN32
-std::string& GetExeDirectory();
+const std::string& GetExeDirectory();
 std::string AppDataRoamingDirectory();
 #endif