Fix fontsize calculation in text_to_tspans. Fixes #62.

Author: agraef

pd/nw/pdgui.js

@@ -3801,8 +3801,10 @@ function text_to_tspans(cid, svg_text, text, type) {
     var is_comment = type && type === "text";
     lines = text.split("\n");
     len = lines.length;
-    // Get fontsize (minus the trailing "px")
-    fontsize = svg_text.getAttribute("font-size").slice(0, -2);
+    // Get fontsize (minus the trailing "px" if needed)
+    fontsize = svg_text.getAttribute("font-size");
+    if (fontsize.includes("px"))
+	fontsize = fontsize.slice(0, -2);
     var dy = text_line_height_kludge(+fontsize, "gui");
     var init_attr, style = {}, fill = null;
     function make_tspan(span) {