SYNERGY-1307 Prevent notifications if language reading fails (#7115)

* SYNERGY-1307 Prevent notifications if language reading fails

* Update ChangeLog

* SYNERGY-1307 Fix code smell

ChangeLog

@@ -18,6 +18,7 @@ Bug fixes:
 - #7097 The title "Enterprise" disappeares after clicking on "Preferences"
 - #7108 Wrong characters on client for unicode
 - #7114 Fixed problem with reading languages on Linux system
+- #7115 Prevent notifications if language reading fails
 
 Enhancements:
 - #7068 Add Synergy restart when settings changed

src/lib/client/ServerProxy.cpp

@@ -35,6 +35,7 @@
 
 #include <memory>
 #include <algorithm>
+#include <cstring>
 
 //
 // ServerProxy
@@ -967,7 +968,7 @@ ServerProxy::setServerLanguages()
 void
 ServerProxy::setActiveServerLanguage(const String& language)
 {
-    if (!language.empty()) {
+    if (!language.empty() && std::strlen(language.c_str()) > 0) {
         if(m_serverLanguage != language) {
             m_isUserNotifiedAboutLanguageSyncError = false;
             m_serverLanguage = language;

src/lib/synergy/languages/LanguageManager.cpp

@@ -89,7 +89,13 @@ String LanguageManager::getSerializedLocalLanguages() const
 
 bool LanguageManager::isLanguageInstalled(const String& language) const
 {
-    return (std::find(m_localLanguages.begin(), m_localLanguages.end(), language) != m_localLanguages.end());
+    bool isInstalled = true;
+
+    if (!m_localLanguages.empty()) {
+        isInstalled = (std::find(m_localLanguages.begin(), m_localLanguages.end(), language) != m_localLanguages.end());
+    }
+
+    return isInstalled;
 }
 
 } //namespace languages