fix re2c version comparison

Author: weltling

win32/build/confutils.js

@@ -2663,6 +2663,10 @@ function toolset_setup_project_tools()
 		RE2CVERS = probe_binary(RE2C, "version");
 		STDOUT.WriteLine('  Detected re2c version ' + RE2CVERS);
 
+		if (RE2CVERS.match(/^\d+.\d+$/)) {
+			RE2CVERS += ".0";
+		}
+
 		intvers = RE2CVERS.replace(pattern, '') - 0;
 		intmin = MINRE2C.replace(pattern, '') - 0;