fix order of operations in comments

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/ppc/gmc_altivec.c

@@ -66,7 +66,7 @@ void ff_gmc1_altivec(uint8_t *dst /* align 8 */, uint8_t *src /* align1 */, int
     srcvA = vec_perm(src_0, src_1, vec_lvsl(0, src));
 
     if (src_really_odd != 0x0000000F) {
-        // if src & 0xF == 0xF, then (src+1) is properly aligned
+        // if (src & 0xF) == 0xF, then (src+1) is properly aligned
         // on the second vector.
         srcvB = vec_perm(src_0, src_1, vec_lvsl(1, src));
     } else {
@@ -90,7 +90,7 @@ void ff_gmc1_altivec(uint8_t *dst /* align 8 */, uint8_t *src /* align1 */, int
         srcvC = vec_perm(src_0, src_1, vec_lvsl(stride + 0, src));
 
         if (src_really_odd != 0x0000000F) {
-            // if src & 0xF == 0xF, then (src+1) is properly aligned
+            // if (src & 0xF) == 0xF, then (src+1) is properly aligned
             // on the second vector.
             srcvD = vec_perm(src_0, src_1, vec_lvsl(stride + 1, src));
         } else {

libavutil/opt.h

@@ -320,7 +320,7 @@ typedef struct AVOptionRanges {
 /**
  * Look for an option in obj. Look only for the options which
  * have the flags set as specified in mask and flags (that is,
- * for which it is the case that opt->flags & mask == flags).
+ * for which it is the case that (opt->flags & mask) == flags).
  *
  * @param[in] obj a pointer to a struct whose first element is a
  * pointer to an AVClass

libavutil/pixfmt.h

@@ -59,8 +59,8 @@
  * allocating the picture.
  *
  * @note
- * Make sure that all newly added big-endian formats have pix_fmt & 1 == 1
+ * Make sure that all newly added big-endian formats have (pix_fmt & 1) == 1
- * and that all newly added little-endian formats have pix_fmt & 1 == 0.
+ * and that all newly added little-endian formats have (pix_fmt & 1) == 0.
  * This allows simpler detection of big vs little-endian.
  */
 enum AVPixelFormat {