Update Ex_1.24_synerrors.c

[tpun27]

Updated typos in lines 87-94 in the 'search' function.

Previously, the code checked for brackets while incrementing the parentheses count and checked for parentheses while incrementing the brackets count.

The code now increments the brackets and parentheses count appropriately.

[orsenthil]

Thanks for this contribution, @tpun27 !