Fix the V8_GNUC_PREREQ macro.

include/v8config.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8CONFIG_H_
 #define V8CONFIG_H_
 
 // Platform headers for feature detection below.
 #if defined(__ANDROID__)
 # include <sys/cdefs.h>
@@ skipping 24 matching lines @@
 // for example clang and the Intel C++ compiler for Linux.
 // Use like:
 //  #if V8_GNUC_PREREQ(4, 3, 1)
 //   ...
 //  #endif
 #if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
 # define V8_GNUC_PREREQ(major, minor, patchlevel)                         \
     ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >=   \
      ((major) * 10000 + (minor) * 100 + (patchlevel)))
 #elif defined(__GNUC__) && defined(__GNUC_MINOR__)
-# define V8_GNUC_PREREQ(major, minor, patchlevel)       \
-    ((__GNUC__ * 10000 + __GNUC_MINOR__) >=             \
+# define V8_GNUC_PREREQ(major, minor, patchlevel)      \
+    ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >=      \
      ((major) * 10000 + (minor) * 100 + (patchlevel)))
 #else
 # define V8_GNUC_PREREQ(major, minor, patchlevel) 0
 #endif
 
 
 
 // -----------------------------------------------------------------------------
 // Operating system detection
 //
@@ skipping 371 matching lines @@
 // Annotate a function indicating the caller must examine the return value.
 // Use like:
 //   int foo() WARN_UNUSED_RESULT;
 #if V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT
 #define V8_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
 #else
 #define V8_WARN_UNUSED_RESULT /* NOT SUPPORTED */
 #endif
 
 #endif  // V8CONFIG_H_