fix build string for builds without valid .git folder

srsenb/src/enb.cc

@@ -364,7 +364,7 @@ std::string enb::get_build_mode()
 
 std::string enb::get_build_info()
 {
-  if (std::string(srslte_get_build_info()) == "") {
+  if (std::string(srslte_get_build_info()).find("  ") != std::string::npos) {
     return std::string(srslte_get_version());
   }
   return std::string(srslte_get_build_info());

srsepc/src/main.cc

@@ -336,7 +336,7 @@ std::string get_build_mode()
 
 std::string get_build_info()
 {
-  if (std::string(srslte_get_build_info()) == "") {
+  if (std::string(srslte_get_build_info()).find("  ") != std::string::npos) {
     return std::string(srslte_get_version());
   }
   return std::string(srslte_get_build_info());

srsue/src/ue_base.cc

@@ -133,7 +133,7 @@ std::string ue_base::get_build_mode()
 
 std::string ue_base::get_build_info()
 {
-  if (std::string(srslte_get_build_info()) == "") {
+  if (std::string(srslte_get_build_info()).find("  ") != std::string::npos) {
     return std::string(srslte_get_version());
   }
   return std::string(srslte_get_build_info());