Update version number to 2.4.1 in common.h.

src/google/protobuf/compiler/plugin.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers.  Please update
 #error your headers.
 #endif
-#if 2004000 < GOOGLE_PROTOBUF_MIN_PROTOC_VERSION
+#if 2004001 < GOOGLE_PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers.  Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/descriptor.pb.h

@@ -13,7 +13,7 @@
 #error incompatible with your Protocol Buffer headers.  Please update
 #error your headers.
 #endif
-#if 2004000 < GOOGLE_PROTOBUF_MIN_PROTOC_VERSION
+#if 2004001 < GOOGLE_PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers.  Please
 #error regenerate this file with a newer version of protoc.

src/google/protobuf/stubs/common.h

@@ -108,7 +108,7 @@ namespace internal {
 
 // The current version, represented as a single integer to make comparison
 // easier:  major * 10^6 + minor * 10^3 + micro
-#define GOOGLE_PROTOBUF_VERSION 2004000
+#define GOOGLE_PROTOBUF_VERSION 2004001
 
 // The minimum library version which works with the current version of the
 // headers.