fix codespell issues

src/modules/module-filter-chain/biquad.h

@@ -15,7 +15,7 @@ extern "C" {
  * are stored in x1 and x2, and the previous two outputs are stored in y1 and
  * y2.
  *
- * We use double during the coefficients calculation for better accurary, but
+ * We use double during the coefficients calculation for better accuracy, but
  * float is used during the actual filtering for faster computation.
  */
 struct biquad {

src/modules/module-filter-chain/pffft.c

@@ -85,7 +85,7 @@
 #endif
 
 /*
-   vector support macros: the rest of the code is independant of
+   vector support macros: the rest of the code is independent of
    SSE/Altivec/NEON -- adding support for other platforms with 4-element
    vectors should be limited to these macros
 */

src/modules/module-filter-chain/pffft.h

@@ -170,7 +170,7 @@ extern "C" {
   void *pffft_aligned_malloc(size_t nb_bytes);
   void pffft_aligned_free(void *);
 
-  /* return 4 or 1 wether support SSE/Altivec instructions was enable when building pffft.c */
+  /* return 4 or 1 weather support SSE/Altivec instructions was enable when building pffft.c */
   int pffft_simd_size();
 
   void pffft_select_cpu(int flags);

src/modules/module-protocol-pulse/modules/module-combine-sink.c

@@ -55,7 +55,7 @@ static const struct spa_dict_item module_combine_sink_info[] = {
 struct module_combine_sink_data;
 
 /* This goes to the stream event listener to be able to identify the stream on
- * which the event occured and to have a link to the module data */
+ * which the event occurred and to have a link to the module data */
 struct combine_stream {
 	struct pw_stream *stream;
 	struct spa_hook stream_listener;