mute pango warning about depreciation of pango_coverage_unref for pango>=1.50.4

Author: zdenop

src/training/pango/pango_font_info.cpp

@@ -230,7 +230,7 @@ bool PangoFontInfo::CoversUTF8Text(const char *utf8_text, int byte_length) const
       int len = it.get_utf8(tmp);
       tmp[len] = '\0';
       tlog(2, "'%s' (U+%x) not covered by font\n", tmp, *it);
-#if PANGO_VERSION_CHECK(1, 52, 0)
+#if PANGO_VERSION_CHECK(1, 50, 4)
       g_object_unref(coverage);
 #else
       pango_coverage_unref(coverage);
@@ -239,7 +239,7 @@ bool PangoFontInfo::CoversUTF8Text(const char *utf8_text, int byte_length) const
       return false;
     }
   }
-#if PANGO_VERSION_CHECK(1, 52, 0)
+#if PANGO_VERSION_CHECK(1, 50, 4)
   g_object_unref(coverage);
 #else
   pango_coverage_unref(coverage);
@@ -311,7 +311,7 @@ int PangoFontInfo::DropUncoveredChars(std::string *utf8_text) const {
     my_strnmove(out, utf8_char, utf8_len);
     out += utf8_len;
   }
-#if PANGO_VERSION_CHECK(1, 52, 0)
+#if PANGO_VERSION_CHECK(1, 50, 4)
   g_object_unref(coverage);
 #else
   pango_coverage_unref(coverage);
@@ -615,7 +615,7 @@ int FontUtils::FontScore(const std::unordered_map<char32, int64_t> &ch_map,
       ch_flags->push_back(covered);
     }
   }
-#if PANGO_VERSION_CHECK(1, 52, 0)
+#if PANGO_VERSION_CHECK(1, 50, 4)
   g_object_unref(coverage);
 #else
   pango_coverage_unref(coverage);