TitleEditor: Support SVG contain tspan element without style attribute

[mitsu-ksgr]

Issue

If the SVG contains a tspan element without style attribute, "Edit Title" will not work.

• sample svg

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:svg="http://www.w3.org/2000/svg" version="1.1" width="720" height="486" id="svg2985">
   <defs id="defs2987" />
   <g id="layer1">
      <text x="50.03632" y="273.45352" id="text2993" xml:space="preserve" style="font-size:155.10592651px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans">
         <tspan x="50.03632" y="273.45352" id="tspan2995">My Title</tspan>
      </text>
   </g>
</svg>

This svg from https://cloud.openshot.org/doc/text.html#example-svg-contents

• Error log
  error.log

env

• OS: Debian buster
• OpenShot: latest develop branch (8f363de)
• libopenshot: 0.2.7
• libopenshot-audio: 0.2.2

Fix

Fixed to treat the value of the style attribute as an empty string when the tspan element does not have the style attribute.

thanks!

[jonoomph]

Blender fails to launch on Ubuntu 22.04 using AppImage (daily build)

[jonoomph]

LGTM!

[jonoomph]

PR: TitleEditor - Support SVG contain tspan without style attr