common.h: Make IS_ALIGNED() safe for testing with alignment == 0

Make IS_ALIGNED() safe for testing with alignment == 0. Without this fix
the DSP will crash if alignemnet is 0.

Signed-off-by: Jyri Sarha <jyri.sarha@linux.intel.com>

Author: Jyri Sarha

src/include/sof/common.h

@@ -20,7 +20,7 @@
 
 /* Align the number to the nearest alignment value */
 #ifndef IS_ALIGNED
-#define IS_ALIGNED(size, alignment) ((size) % (alignment) == 0)
+#define IS_ALIGNED(size, alignment) (!(alignment) || (size) % (alignment) == 0)
 #endif
 
 /* Treat zero as a special case because it wraps around */