Fixed OpenGL texture loading example in comment + Discourse link to root of discourse

docs/README.md

@@ -215,7 +215,7 @@ See the [Wiki](https://github.com/ocornut/imgui/wiki) for more references and [B
 Support Forums
 --------------
 
-If you have issues with: compiling, linking, adding fonts, running or displaying Dear ImGui, or wiring inputs: please post on the Discourse forum: https://discourse.dearimgui.org/c/getting-started.
+If you have issues with: compiling, linking, adding fonts, running or displaying Dear ImGui, or wiring inputs: please post on the Discourse forum: https://discourse.dearimgui.org.
 
 For any other questions, bug reports, requests, feedback, you may post on https://github.com/ocornut/imgui/issues.
 

imgui.cpp

@@ -598,6 +598,8 @@ CODE
         GLuint my_opengl_texture;
         glGenTextures(1, &my_opengl_texture);
         glBindTexture(GL_TEXTURE_2D, my_opengl_texture);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
         glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image_width, image_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image_data);