remove the unneeded header file math.h in binaryheap.c

[liujinyang]

Hi Hackers,




I found in file binaryheap.c， file "math.h" was included, but it is uncessary, 
so I removed it 

and filing a patch to address the issue.




I have verified that, build is OK.




Please see the attachment and help review it.




thanks a lot!




liujinyang

v1-0001-remove-the-unneeded-header-file-math.h-in-binaryh.patch
Description: Binary data