Fix incorrect format placeholders in pgstat.c
These should have been switched from %d to %u in 3188a4582a8c in the
debugging elogs added in ca1ba50fcb6f. PgStat_Kind should never be
higher than INT32_MAX, but let's be clean.
Issue noticed while hacking more on this area.
Branch
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master
D
Add -Wmissing-variable-declarations to the standard compilation flags
This warning flag detects global variables not declared in header
files. This is similar to what -Wmissing-prototypes does for
functions. (More correctly, it is similar to what
-Wmissing-declarations does for functions, but -W
