From a30dca0b0e0e66cc9fa4363cdc22b07961340ee4 Mon Sep 17 00:00:00 2001
From: Ingo Weyrich <heckflosse67@gmx.de>
Date: Tue, 13 Oct 2020 13:27:20 +0200
Subject: [PATCH] Profiled lens correction: Do not call lensfun search with
 empty strings

---
 rtengine/rtlensfun.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rtengine/rtlensfun.cc b/rtengine/rtlensfun.cc
index 363819cf7..58f3d12a3 100644
--- a/rtengine/rtlensfun.cc
+++ b/rtengine/rtlensfun.cc
@@ -438,7 +438,7 @@ std::vector<LFLens> LFDatabase::getLenses() const
 LFCamera LFDatabase::findCamera(const Glib::ustring &make, const Glib::ustring &model) const
 {
     LFCamera ret;
-    if (data_) {
+    if (data_ && !make.empty()) {
         MyMutex::MyLock lock(lfDBMutex);
         auto found = data_->FindCamerasExt(make.c_str(), model.c_str());
         if (found) {
@@ -453,7 +453,7 @@ LFCamera LFDatabase::findCamera(const Glib::ustring &make, const Glib::ustring &
 LFLens LFDatabase::findLens(const LFCamera &camera, const Glib::ustring &name) const
 {
     LFLens ret;
-    if (data_) {
+    if (data_ && !name.empty()) {
         MyMutex::MyLock lock(lfDBMutex);
         auto found = data_->FindLenses(camera.data_, nullptr, name.c_str());
         for (size_t pos = 0; !found && pos < name.size(); ) {