mavros_extras: Fix a sequence point warning #1808
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This line triggers a
-Wsequence-pointwarning. You can read about it here: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.htmlIt seems to be that doing
++(which modifies a variable) and assigning the result back to the same variable can be undefined behaviour.In this case, we don't need to pre-increment, we can just add one, and then save the result back to the variable. This makes the warning go away, and seems to make sense.