Handle openvr-specific warnings more precisely;

Instead of disabling a warning for the entire project, it is only
disabled while processing the OpenVR header.

CMakeLists.txt

@@ -449,9 +449,6 @@ if(LOVR_ENABLE_HEADSET)
   if(LOVR_USE_OPENVR)
     add_definitions(-DLOVR_USE_OPENVR)
     target_sources(lovr PRIVATE src/modules/headset/headset_openvr.c)
-    if(UNIX)
-      target_compile_options(lovr PRIVATE -Wno-typedef-redefinition)
-    endif()
   endif()
   if(LOVR_USE_OPENXR)
     add_definitions(-DLOVR_USE_OPENXR)

Tuprules.tup

@@ -9,7 +9,6 @@ CFLAGS += -I$(ROOT)/src/modules
 CFLAGS += -fvisibility=hidden
 CFLAGS += -Wall -Wextra
 CFLAGS += -Wno-unused-parameter
-CFLAGS_@(OPENVR) += -Wno-typedef-redefinition
 CFLAGS_@(STRICT) += -Werror
 FLAGS_@(DEBUG) += -g
 FLAGS_@(OPTIMIZE) += -Oz

src/modules/headset/headset_openvr.c

@@ -16,7 +16,10 @@
 #include <stdlib.h>
 #include <stdint.h>
 #undef EXTERN_C
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wtypedef-redefinition"
 #include <openvr_capi.h>
+#pragma clang diagnostic pop
 
 // From openvr_capi.h
 extern intptr_t VR_InitInternal(EVRInitError *peError, EVRApplicationType eType);