OGL: Fix MSAA being forced to 1x

This was a regression from the remove-everything-static-from-renderer
PR. As the comment indicates, it would be nice to move all of this logic
out of the Renderer constructor, but this is a much larger change.

Source/Core/VideoBackends/OGL/Render.cpp

@@ -580,6 +580,10 @@ Renderer::Renderer()
   g_Config.backend_info.bSupportsEarlyZ =
       g_ogl_config.bSupportsEarlyFragmentTests || g_ogl_config.bSupportsConservativeDepth;
 
+  glGetIntegerv(GL_MAX_SAMPLES, &g_ogl_config.max_samples);
+  if (g_ogl_config.max_samples < 1 || !g_ogl_config.bSupportsMSAA)
+    g_ogl_config.max_samples = 1;
+
   if (g_ogl_config.bSupportsDebug)
   {
     if (GLExtensions::Supports("GL_KHR_debug"))

Source/Core/VideoBackends/OGL/main.cpp

@@ -170,10 +170,6 @@ bool VideoBackend::FillBackendInfo()
     return false;
   }
 
-  glGetIntegerv(GL_MAX_SAMPLES, &g_ogl_config.max_samples);
-  if (g_ogl_config.max_samples < 1 || !g_ogl_config.bSupportsMSAA)
-    g_ogl_config.max_samples = 1;
-
   // TODO: Move the remaining fields from the Renderer constructor here.
   return true;
 }