Break compatibility only when first part of version number changes, in this

specific case for ff_eval deprecation.

Originally committed as revision 6358 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/eval.c

@@ -264,7 +264,7 @@ double ff_eval2(char *s, double *const_value, const char **const_name,
     return evalExpression(&p);
 }
 
-#if LIBAVCODEC_VERSION_INT < ((51<<16)+(17<<8)+0)
+#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 attribute_deprecated double ff_eval(char *s, double *const_value, const char **const_name,
                double (**func1)(void *, double), const char **func1_name,
                double (**func2)(void *, double, double), char **func2_name,