Fix missing return

Author: AntoinePrv

include/xsimd/xsimd_cpu_features_x86.hpp

@@ -248,10 +248,11 @@ namespace xsimd
         inline cpuid_reg_t get_cpuid(int level, int count) noexcept
         {
             cpuid_reg_t reg = {};
+
 #if !XSIMD_TARGET_X86
             (void)level;
             (void)count;
-            return reg; // All bits to zero
+            return {}; // All bits to zero
 
 #elif defined(_MSC_VER)
             __cpuidex(reg, level, count);
@@ -275,6 +276,7 @@ namespace xsimd
                     : "0"(level), "2"(count));
 #endif
 #endif
+            return reg;
         }
 
         inline xcr0_reg_t get_xcr0_low() noexcept