Add STRICT to some C functions created by the regression tests.

These functions readily crash when passed a NULL input value.  The tests
themselves do not pass NULL values to them; but when the regression
database is used as a basis for fuzz testing, they cause a lot of noise.
Also, if someone were to leave a regression database lying about in a
production installation, these would create a minor security hazard.

Andreas Seltenreich

src/test/regress/input/create_function_2.source

@@ -74,32 +74,32 @@ CREATE FUNCTION user_relns()
 CREATE FUNCTION pt_in_widget(point, widget)
    RETURNS bool
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 
 CREATE FUNCTION overpaid(emp)
    RETURNS bool
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 
 CREATE FUNCTION boxarea(box)
    RETURNS float8
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 
 CREATE FUNCTION interpt_pp(path, path)
    RETURNS point
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 
 CREATE FUNCTION reverse_name(name)
    RETURNS name
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 
 CREATE FUNCTION oldstyle_length(int4, text)
    RETURNS int4
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C;  -- intentionally not strict
 
 --
 -- Function dynamic loading

src/test/regress/output/create_function_2.source

@@ -58,27 +58,27 @@ CREATE FUNCTION user_relns()
 CREATE FUNCTION pt_in_widget(point, widget)
    RETURNS bool
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 CREATE FUNCTION overpaid(emp)
    RETURNS bool
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 CREATE FUNCTION boxarea(box)
    RETURNS float8
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 CREATE FUNCTION interpt_pp(path, path)
    RETURNS point
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 CREATE FUNCTION reverse_name(name)
    RETURNS name
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C STRICT;
 CREATE FUNCTION oldstyle_length(int4, text)
    RETURNS int4
    AS '@libdir@/regress@DLSUFFIX@'
-   LANGUAGE C;
+   LANGUAGE C;  -- intentionally not strict
 --
 -- Function dynamic loading
 --