Fix - ensure hist title height

Should not be less then configured in gStlye font size

Author: linev

modules/hist/TPavePainter.mjs

@@ -1389,10 +1389,10 @@ class TPavePainter extends ObjectPainter {
             } else if ((opt === 'postitle') || painter.isDummyPos(pave)) {
                const st = gStyle, fp = painter.getFramePainter();
                if (st && fp) {
-                  const midx = st.fTitleX, y2 = st.fTitleY;
+                  const midx = st.fTitleX, y2 = st.fTitleY, fsz = st.fTitleFontSize;
                   let w = st.fTitleW, h = st.fTitleH;
 
-                  if (!h) h = (y2 - fp.fY2NDC) * 0.7;
+                  if (!h) h = Math.max((y2 - fp.fY2NDC) * 0.7, (fsz < 1) ? 1.1 * fsz : 1.1 * fsz / fp.getFrameWidth());
                   if (!w) w = fp.fX2NDC - fp.fX1NDC;
                   if (!Number.isFinite(h) || (h <= 0)) h = 0.06;
                   if (!Number.isFinite(w) || (w <= 0)) w = 0.44;