More changes to reduce complaints from CppCheck. Some latent bugs fixes, but probably some new typos introduced

ChangeLog

@@ -6571,5 +6571,5 @@
 	* configs/mikroe-stm32f4/src/up_mio283qt9a.c: The Mikroe STM32F4 can
 	  now support the newer MIO283QT9A LCD. From Toby Duckworth (2014-2-10).
 	* MANY files changes based on complaints from the tool CppCheck.  Several
-	  latent bugs were fixed (and most likely some new typos were introducted)
+	  latent bugs were fixed (and most likely some new typos were introduced)
 	  (2014-2-10).

arch/arm/src/sama5/sam_nand.c

@@ -2518,7 +2518,7 @@ errout:
 static inline int nand_tryeraseblock(struct sam_nandcs_s *priv, off_t block)
 {
   uint32_t rowaddr;
-  int ret = OK;
+  int ret;
 
   /* Calculate address used for erase */
 

audio/audio.c

@@ -958,6 +958,7 @@ int audio_register(FAR const char *name, FAR struct audio_lowerhalf_s *dev)
     {
       strcat(path, "/");
     }
+
   strcat(path, name);
 
 #endif /* CONFIG_AUDIO_DEV_PATH=="/dev" */