Fix a ring buffer alignment error.

Public issue https://github.com/mackron/miniaudio/issues/979

miniaudio.h

@@ -56641,7 +56641,7 @@ MA_API ma_result ma_rb_init_ex(size_t subbufferSizeInBytes, size_t subbufferCoun
         Here is where we allocate our own buffer. We always want to align this to MA_SIMD_ALIGNMENT for future SIMD optimization opportunity. To do this
         we need to make sure the stride is a multiple of MA_SIMD_ALIGNMENT.
         */
-        pRB->subbufferStrideInBytes = (pRB->subbufferSizeInBytes + (MA_SIMD_ALIGNMENT-1)) & ~MA_SIMD_ALIGNMENT;
+        pRB->subbufferStrideInBytes = ma_align(pRB->subbufferSizeInBytes, MA_SIMD_ALIGNMENT);
 
         bufferSizeInBytes = (size_t)pRB->subbufferCount*pRB->subbufferStrideInBytes;
         pRB->pBuffer = ma_aligned_malloc(bufferSizeInBytes, MA_SIMD_ALIGNMENT, &pRB->allocationCallbacks);