Call XInitThreads on plugin bridges

source/bridges-plugin/CarlaBridgePlugin.cpp

@@ -25,6 +25,10 @@
 # include <signal.h>
 #endif
 
+#ifdef CARLA_OS_LINUX
+# include <X11/Xlib.h>
+#endif
+
 #include "jackbridge/JackBridge.hpp"
 #include "juce_core.h"
 
@@ -414,6 +418,11 @@ int main(int argc, char* argv[])
             extraStuff = "true";
     }
 
+#ifdef CARLA_OS_LINUX
+    if (std::getenv("DISPLAY") != nullptr)
+        XInitThreads();
+#endif
+
     // ---------------------------------------------------------------------
     // Init plugin bridge
 

source/utils/CarlaPipeUtils.cpp

@@ -241,7 +241,7 @@ bool startProcess(const char* const argv[], pid_t& pidinst) noexcept
         CarlaString error(std::strerror(errno));
         carla_stderr2("exec failed: %s", error.buffer());
 
-        _exit(0); // this is not noexcept safe but doesn't matter anyway
+        _exit(1); // this is not noexcept safe but doesn't matter anyway
     }   break;
 
     case -1: { // error