Fix build against old glfw3

src/gui.cpp

@@ -22,6 +22,10 @@
 	#include <ApplicationServices/ApplicationServices.h>
 #endif
 
+#if GLFW_VERSION_MINOR == 0 && GLFW_VERSION_REVISION <= 4
+#define OLD_GLFW_VERSION
+#endif
+
 namespace rack {
 
 static GLFWwindow *window = NULL;
@@ -227,7 +231,9 @@ void guiInit() {
 	// glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
 	// glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
 	// glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+#ifndef OLD_GLFW_VERSION
 	glfwWindowHint(GLFW_MAXIMIZED, GLFW_TRUE);
+#endif
 	std::string title = gApplicationName + " " + gApplicationVersion;
 	window = glfwCreateWindow(1000, 750, title.c_str(), NULL, NULL);
 	assert(window);
@@ -254,7 +260,9 @@ void guiInit() {
 	// GLEW generates GL error because it calls glGetString(GL_EXTENSIONS), we'll consume it here.
 	glGetError();
 
+#ifndef OLD_GLFW_VERSION
 	glfwSetWindowSizeLimits(window, 640, 480, GLFW_DONT_CARE, GLFW_DONT_CARE);
+#endif
 
 	// Set up NanoVG
 	gVg = nvgCreateGL2(NVG_ANTIALIAS);