Use ultra-strict warnings and Werror on Windows CI rows

.gitlab-ci.yml

@@ -175,7 +175,7 @@ test:mac_rel:
 
 win_dbg:
   <<: *build_definition
-  script: python ./waf configure build -dST --no-coverage
+  script: python ./waf configure build -dST --werror --no-coverage
   tags: [windows,msvc,python]
 
 test:win_dbg:
@@ -187,7 +187,7 @@ test:win_dbg:
 
 win_rel:
   <<: *build_definition
-  script: python ./waf configure build -ST --no-coverage
+  script: python ./waf configure build -ST --werror --no-coverage
   tags: [windows,msvc,python]
 
 test:win_rel:

wscript

@@ -78,6 +78,8 @@ def configure(conf):
                 '/wd4061',  # enumerator in switch is not explicitly handled
                 '/wd4365',  # signed/unsigned mismatch
                 '/wd4514',  # unreferenced inline function has been removed
+                '/wd4710',  # function not inlined
+                '/wd4711',  # function selected for automatic inline expansion
                 '/wd4820',  # padding added after construct
                 '/wd4996',  # POSIX name for this item is deprecated
             ],