More warnings: mark/avert truncating conversions from float.

Source/Plugins/Plugin_VideoDX9/Src/Render.cpp

@@ -1318,7 +1318,7 @@ void Renderer::SetLineWidth()
 	// We can't change line width in D3D unless we use ID3DXLine
 	float fratio = xfregs.viewport.wd != 0 ? Renderer::EFBToScaledXf(1.f) : 1.0f;
 	float psize = bpmem.lineptwidth.pointsize * fratio / 6.0f;
-	psize = psize > 0 ? psize : 1.0;    
+	psize = psize > 0 ? psize : 1.0f;
 	if (psize > m_fMaxPointSize)
 	{
 		psize = m_fMaxPointSize;