don't exit the program for Glib charset

Index: src/platform/guigtk.cpp
--- src/platform/guigtk.cpp.orig
+++ src/platform/guigtk.cpp
@@ -1505,10 +1505,7 @@ std::vector<std::string> InitGui(int argc, char **argv
     // character set; otherwise it thinks it is always ANSI_X3.4-1968.
     // We set it back to C after all so that printf() and friends behave in a consistent way.
     setlocale(LC_ALL, "");
-    if(!Glib::get_charset()) {
-        dbp("Sorry, only UTF-8 locales are supported.");
-        exit(1);
-    }
+    Glib::get_charset();
     setlocale(LC_ALL, "C");

     // Let GTK parse arguments and update argc/argv. (They're passed by reference.)