Fixed initialization failing on headless systems.

Fixes #482.

README.md

@@ -62,6 +62,8 @@ GLFW bundles a number of dependencies in the `deps/` directory.
 
 ## Changelog
 
+ - Bugfix: Initialization failed on headless systems
+
 
 ## Contact
 

src/init.c

@@ -129,13 +129,6 @@ GLFWAPI int glfwInit(void)
     }
 
     _glfw.monitors = _glfwPlatformGetMonitors(&_glfw.monitorCount);
-    if (!_glfw.monitorCount)
-    {
-        _glfwInputError(GLFW_PLATFORM_ERROR, "No monitors found");
-        _glfwPlatformTerminate();
-        return GL_FALSE;
-    }
-
     _glfwInitialized = GL_TRUE;
 
     // Not all window hints have zero as their default value

src/monitor.c

@@ -305,6 +305,10 @@ GLFWAPI GLFWmonitor** glfwGetMonitors(int* count)
 GLFWAPI GLFWmonitor* glfwGetPrimaryMonitor(void)
 {
     _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
+
+    if (!_glfw.monitorCount)
+        return NULL;
+
     return (GLFWmonitor*) _glfw.monitors[0];
 }