text-freetype2: Fix FC_INDEX retrieval

FcPatternGetInteger was called with value list index
1 instead of 0, requesting a non-existent second
value. For TTC/OTC font collections where the matched
face has a non-zero index, this caused the wrong face
to be loaded — potentially one with incomplete
character coverage, resulting in missing glyphs.

Author: reyohoho

plugins/text-freetype2/find-font-unix.c

@@ -59,7 +59,7 @@ const char *get_font_path(const char *family, uint16_t size, const char *style,
 		FcStrFree(path);
 
 		int fc_index = 0;
-		FcPatternGetInteger(match, FC_INDEX, 1, &fc_index);
+		FcPatternGetInteger(match, FC_INDEX, 0, &fc_index);
 		*idx = (FT_Long)fc_index;
 
 		FcPatternDestroy(match);