Eeschema, plot: fix missing initialization that created 0 size texts.

0 sized texts are hard to read

common/plotters/plotter.cpp

@@ -705,6 +705,7 @@ void PLOTTER::Text( const VECTOR2I&             aPos,
     attributes.m_Bold = aBold;
     attributes.m_Halign = aH_justify;
     attributes.m_Valign = aV_justify;
+    attributes.m_Size = aSize;
 
     if( !aFont )
         aFont = KIFONT::FONT::GetFont();