Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/sp65/raw.c

@@ -52,8 +52,8 @@
 
 StrBuf* GenRaw (const Bitmap* B, const Collection* A attribute ((unused)))
 /* Generate binary output in raw format. The output is stored in a string
- * buffer (which is actually a dynamic char array) and returned.
- */
+** buffer (which is actually a dynamic char array) and returned.
+*/
 {
     StrBuf* D;
     unsigned X, Y;