warning: dereferencing type-punned pointer

[robe]

setting up deb9 and notice slave running has this

g_serialized.c: In function ‘gserialized_cmp’:
g_serialized.c:310:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   *(uint32_t*)(g1->data) == POINTTYPE &&
   ^
g_serialized.c:311:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
   *(uint32_t*)(g2->data) == POINTTYPE
   ^

Not sure if above is anything to worry about. running with below

 -------------- Compiler Info ------------- 
  C compiler:           gcc -g -O2
  SQL preprocessor:     /usr/bin/cpp -traditional-cpp -w -P

 -------------- Dependencies -------------- 
  GEOS config:          /usr/bin/geos-config
  GEOS version:         3.5.1
  GDAL config:          /usr/bin/gdal-config
  GDAL version:         2.1.2
  SFCGAL config:        /usr/bin/sfcgal-config
  SFCGAL version:       1.3.0
  PostgreSQL config:    /usr/bin/pg_config
  PostgreSQL version:   PostgreSQL 9.6.6
  PROJ4 version:        49
  Libxml2 config:       /usr/bin/xml2-config
  Libxml2 version:      2.9.4
  JSON-C support:       yes
  protobuf-c support:   no
  PCRE support:         yes
  Perl:                 /usr/bin/perl

 --------------- Extensions --------------- 
  PostGIS Raster:       enabled
  PostGIS Topology:     enabled
  SFCGAL support:       enabled
  Address Standardizer support:       enabled

 -------- Documentation Generation -------- 
  xsltproc:             
  xsl style sheets:     
  dblatex:              
  convert:              /usr/bin/convert
  mathml2.dtd:          http://www.w3.org/Math/DTD/mathml2/mathml2.dtd

configure: WARNING:  --------- GEOS VERSION WARNING ------------ 
configure: WARNING:   You are building against GEOS 3.5.1 
configure: WARNING:   To take advantage of all the features of 
configure: WARNING:   this PostGIS version requires GEOS 3.7.0 or higher which is not out yet.
configure: WARNING:   To take advantage of most of the features of this PostGIS
configure: WARNING:   we recommend GEOS 3.6 or higher
configure: WARNING:   You can download the latest versions from 
configure: WARNING:   http://trac.osgeo.org/geos 
configure: WARNING: 

[komzpa]

I've got rid of this warning here: ​https://github.com/postgis/postgis/commit/ebb5f4c502135be1900ad936d923952abad3973a#diff-742b8e6974a8ed0f30eacc8b12ed82ddR308

and it was later reintroduced by pramsey in the next commit: ​https://github.com/postgis/postgis/commit/699fddf0cf254cd01d154ba2e5d5055e94f82efe

[pramsey]

In 16141:

Remove warning under gcc (closes #3935)

[pramsey]

yuck yuck yuck