Fixed GCC build.

src/shader_spirv.cpp

@@ -26,7 +26,12 @@ namespace bgfx
 #define SPV_OPERAND_7(_a0, _a1, _a2, _a3, _a4, _a5, _a6) SPV_OPERAND_1(_a0), SPV_OPERAND_6(_a1, _a2, _a3, _a4, _a5, _a6)
 #define SPV_OPERAND_8(_a0, _a1, _a2, _a3, _a4, _a5, _a6, _a7) SPV_OPERAND_1(_a0), SPV_OPERAND_7(_a1, _a2, _a3, _a4, _a5, _a6, _a7)
 #define SPV_OPERAND_9(_a0, _a1, _a2, _a3, _a4, _a5, _a6, _a7, _a8) SPV_OPERAND_1(_a0), SPV_OPERAND_8(_a1, _a2, _a3, _a4, _a5, _a6, _a7, _a8)
-#define SPV_OPERAND(...) { BX_MACRO_DISPATCHER(SPV_OPERAND_, __VA_ARGS__) BX_VA_ARGS_PASS(__VA_ARGS__) }
+#if BX_COMPILER_MSVC
+// Workaround MSVS bug...
+#	define SPV_OPERAND(...) { BX_MACRO_DISPATCHER(SPV_OPERAND_, __VA_ARGS__) BX_VA_ARGS_PASS(__VA_ARGS__) }
+#else
+#	define SPV_OPERAND(...) { BX_MACRO_DISPATCHER(SPV_OPERAND_, __VA_ARGS__)(__VA_ARGS__) }
+#endif // BX_COMPILER_MSVC
 #define _ Count
 		{ false, false, /* Nop,                                     //   0 */ SPV_OPERAND(_) },
 		{ true,  true,  /* Undef,                                   //   1 */ SPV_OPERAND(_) },