Fix infinite loop in HorizontalTextLayouter if there's not enough spa…

…ce to layout text #2

Happens only if the first chracter we're asking to draw can't be drawn
with the given font and we need to find a new one and the given
available space is negative (as said this function must always layout at
least one character)

poppler/Annot.cc

@@ -3036,7 +3036,7 @@ class HorizontalTextLayouter
             *availableWidth -= blockWidth;
         }
 
-        while (newFontNeeded && (!availableWidth || *availableWidth > 0)) {
+        while (newFontNeeded && (!availableWidth || *availableWidth > 0 || (isUnicode && i == 2) || (!isUnicode && i == 0))) {
             if (!form) {
                 // There's no fonts to look for, so just skip the characters
                 i += isUnicode ? 2 : 1;