gsdx: add/update comment

Need to investigate why the number of vertex is different in upscaled resolution

plugins/GSdx/GSRendererHW.cpp

@@ -511,7 +511,7 @@ void GSRendererHW::Draw()
 					// Mipmap Linear. Both layers are sampled, only take the big one
 					lod = std::max<int>((int)floor(m_vt.m_lod.x), 0);
 				} else {
-					// On GS lod is an int with 4 decimal digit.
+					// On GS lod is a fixed float number 7:4 (4 bit for the frac part)
 					lod = std::max<int>((int)round(m_vt.m_lod.x + 0.0625), 0);
 				}
 			}

plugins/GSdx/GSState.cpp

@@ -2617,6 +2617,8 @@ __forceinline void GSState::VertexKick(uint32 skip)
 		case GS_TRIANGLESTRIP:
 		case GS_TRIANGLEFAN:
 		case GS_SPRITE:
+			// FIXME: GREG I don't understand the purpose of the m_nativeres check
+			// It impacts badly the number of draw call in the HW renderer.
 			test |= m_nativeres ? pmin.eq16(pmax).zwzwl() : pmin.eq16(pmax);
 			break;
 		default: