Linux: don't crash when performing font fallback to a non-scalable font.

webkit/api/src/gtk/WebFontInfo.cpp

Index: webkit/api/src/gtk/WebFontInfo.cpp
diff --git a/webkit/api/src/gtk/WebFontInfo.cpp b/webkit/api/src/gtk/WebFontInfo.cpp
index 2485022f1b6c86e0c353c99bd8f9ffc1da5e4072..264efffd946b81b1f0e3707825710bc974652fa5 100644
--- a/webkit/api/src/gtk/WebFontInfo.cpp
+++ b/webkit/api/src/gtk/WebFontInfo.cpp
@@ -58,6 +58,10 @@ WebString WebFontInfo::familyForChars(const WebUChar* characters, size_t numChar
     fcvalue.u.c = cset;
     FcPatternAdd(pattern, FC_CHARSET, fcvalue, 0);
 
+    fcvalue.type = FcTypeBool;
+    fcvalue.u.b = FcTrue;
+    FcPatternAdd(pattern, FC_SCALABLE, fcvalue, 0);
+
     FcConfigSubstitute(0, pattern, FcMatchPattern);
     FcDefaultSubstitute(pattern);