evas_vg_load_svg: Add check that stroke-dasharray is "none"

Summary:
"none" is the default value of dasharray and can actually be used.
Currently using "none" causes a segfault. This patch prevents it.

Test Plan:
SVG image
```
<svg viewBox="0 0 30 10" xmlns="http://www.w3.org/2000/svg">
  <line x1="0" y1="3" x2="30" y2="3" stroke="black" stroke-dasharray="none" />
</svg>
```

Reviewers: Hermet, raster, kimcinoo

Reviewed By: Hermet

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D12317

src/modules/evas/vg_loaders/svg/evas_vg_load_svg.c

@@ -267,6 +267,8 @@ _PARSE_TAG(Efl_Gfx_Fill_Rule, fill_rule, fill_rule_tags, EFL_GFX_FILL_RULE_WINDI
 static inline void
 _parse_dash_array(const char *str, Efl_Gfx_Dash** dash, int *length)
 {
+   if (strlen(str) >= 4 && !strncmp(str, "none", 4)) return;
+
    // It is assumed that the length of the dasharray string is 255 or less.
    double tmp[255];
    char *end = NULL;