Fix build warning from #error text

Author: jnewbery

src/clientversion.h

@@ -11,7 +11,7 @@
 
 // Check that required client information is defined
 #if !defined(CLIENT_VERSION_MAJOR) || !defined(CLIENT_VERSION_MINOR) || !defined(CLIENT_VERSION_REVISION) || !defined(CLIENT_VERSION_BUILD) || !defined(CLIENT_VERSION_IS_RELEASE) || !defined(COPYRIGHT_YEAR)
-#error Client version information missing: wasn't defined by bitcoin-config.h nor defined any other way
+#error Client version information missing: version is not defined by bitcoin-config.h or in any other way
 #endif
 
 /**