libobs/util: Add PRAGMA_DISABLE_DEPRECATION macro

On MSVC, PRAGMA_WARN_DEPRECATION already does that, but on other
compilers it still throws a warning. PRAGMA_DISABLE_DEPRECATION is for
(rare) situations where it's intentional and correct that the deprecated
API is still used, such as to make sure some other API still works
internally.

libobs/util/c99defs.h

@@ -55,18 +55,22 @@
 #define PRAGMA_WARN_PUSH _Pragma("warning(push)")
 #define PRAGMA_WARN_POP _Pragma("warning(pop)")
 #define PRAGMA_WARN_DEPRECATION _Pragma("warning(disable: 4996)")
+#define PRAGMA_DISABLE_DEPRECATION _Pragma("warning(disable: 4996)")
 #elif defined(__clang__)
 #define PRAGMA_WARN_PUSH _Pragma("clang diagnostic push")
 #define PRAGMA_WARN_POP _Pragma("clang diagnostic pop")
 #define PRAGMA_WARN_DEPRECATION _Pragma("clang diagnostic warning \"-Wdeprecated-declarations\"")
+#define PRAGMA_DISABLE_DEPRECATION _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"")
 #elif defined(__GNUC__)
 #define PRAGMA_WARN_PUSH _Pragma("GCC diagnostic push")
 #define PRAGMA_WARN_POP _Pragma("GCC diagnostic pop")
 #define PRAGMA_WARN_DEPRECATION _Pragma("GCC diagnostic warning \"-Wdeprecated-declarations\"")
+#define PRAGMA_DISABLE_DEPRECATION _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
 #else
 #define PRAGMA_WARN_PUSH
 #define PRAGMA_WARN_POP
 #define PRAGMA_WARN_DEPRECATION
+#define PRAGMA_DISABLE_DEPRECATION
 #endif
 
 #include <stddef.h>