Disallow hashless hex color quirk for non integer <number>

Source/core/css/parser/CSSPropertyParser.cpp

Index: Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/Source/core/css/parser/CSSPropertyParser.cpp b/Source/core/css/parser/CSSPropertyParser.cpp
index d10f8b9cc0dfbe0e304264c470ff4129231d77ae..2cf259ef1eda10ecd30556e698a9c8ea93c97696 100644
--- a/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/Source/core/css/parser/CSSPropertyParser.cpp
@@ -5289,6 +5289,8 @@ bool CSSPropertyParser::parseColorFromValue(CSSParserValue* value, RGBA32& c, bo
 {
     if (acceptQuirkyColors && value->unit == CSSPrimitiveValue::CSS_NUMBER
         && value->fValue >= 0. && value->fValue < 1000000.) {
+        if (!value->isInt)
+            return false;
         String str = String::format("%06d", static_cast<int>((value->fValue+.5)));
         if (!fastParseColor(c, str, !acceptQuirkyColors))
             return false;