Prevent recursion in font glyphs (Fixes #38)

Author: PhenX

src/FontLib/Glyph/OutlineComposite.php

@@ -41,7 +41,10 @@ function getGlyphIDs() {
       $glyphIDs[] = $_component->glyphIndex;
 
       $_glyph   = $this->table->data[$_component->glyphIndex];
-      $glyphIDs = array_merge($glyphIDs, $_glyph->getGlyphIDs());
+
+      if ($_glyph !== $this) {
+        $glyphIDs = array_merge($glyphIDs, $_glyph->getGlyphIDs());
+      }
     }
 
     return $glyphIDs;
@@ -224,10 +227,14 @@ public function getSVGContours() {
     $glyphs = $glyph_data->data;
 
     foreach ($this->components as $component) {
-      $contours[] = array(
-        "contours"  => $glyphs[$component->glyphIndex]->getSVGContours(),
-        "transform" => $component->getMatrix(),
-      );
+      $_glyph = $glyphs[$component->glyphIndex];
+
+      if ($_glyph !== $this) {
+        $contours[] = array(
+          "contours"  => $_glyph->getSVGContours(),
+          "transform" => $component->getMatrix(),
+        );
+      }
     }
 
     return $contours;