Allocate screenshot pixel array on heap.

src/main.cpp

@@ -165,6 +165,7 @@ int main(int argc, char *argv[]) {
 		std::this_thread::sleep_for(std::chrono::seconds(2));
 	}
 	else if (screenshot) {
+		INFO("Taking screenshots of all modules at %gx zoom", screenshotZoom);
 		APP->window->screenshot(screenshotZoom);
 	}
 	else {

src/window.cpp

@@ -431,7 +431,7 @@ void Window::screenshot(float zoom) {
 			// Read pixels
 			int width, height;
 			nvgImageSize(vg, fb->getImageHandle(), &width, &height);
-			uint8_t data[height * width * 4];
+			uint8_t *data = new uint8_t[height * width * 4];
 			glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, data);
 
 			// Flip image vertically
@@ -447,6 +447,7 @@ void Window::screenshot(float zoom) {
 			stbi_write_png(filename.c_str(), width, height, 4, data, width * 4);
 
 			// Cleanup
+			delete[] data;
 			nvgluBindFramebuffer(NULL);
 			delete fb;
 		}