Merge trift2.:/MySQL/M51/clone-5.1

into  trift2.:/MySQL/M51/push-5.1

Makefile.am

@@ -136,8 +136,10 @@ test-bt:
 	@PERL@ ./mysql-test-run.pl --force --comment=rpl --suite=rpl
 	-cd mysql-test ; MTR_BUILD_THREAD=auto \
 	@PERL@ ./mysql-test-run.pl --force --comment=partitions --suite=parts
-	-cd mysql-test ; MTR_BUILD_THREAD=auto \
-	@PERL@ ./mysql-test-run.pl --force --comment=rowlock --suite=row_lock
+
+# Re-enable the "rowlock" suite when bug#28685 is fixed
+#	-cd mysql-test ; MTR_BUILD_THREAD=auto \
+#	@PERL@ ./mysql-test-run.pl --force --comment=rowlock --suite=row_lock
 
 # Re-enable the "jp" suite when bug#28563 is fixed
 #	-cd mysql-test ; MTR_BUILD_THREAD=auto \

sql/my_decimal.h

@@ -40,6 +40,7 @@ C_MODE_END
 /* the number of digits that my_decimal can possibly contain */
 #define DECIMAL_MAX_POSSIBLE_PRECISION (DECIMAL_BUFF_LENGTH * 9)
 
+
 /*
   maximum guaranteed precision of number in decimal digits (number of our
   digits * number of decimal digits in one our big digit - number of decimal