[PATCH] Remove 'strchr' warning from reiserfs

Reiserfs emits a warning about strchr being defined but not used.  I
finally tracked down the reason for this.  gcc - when seeing strstr(x,
"%") recognized that the second parameter is a char, and therefore uses
strchr instead of strstr.  The workaround to avoid the warning is to
replace the call to strstr with strchr - which is OK.

This hides the warning, and brings us down to 6 warnings for a make
defconfig bzImage.

fs/reiserfs/prints.c

@@ -164,7 +164,7 @@ static char * is_there_reiserfs_struct (char * fmt, int * what, int * skip)
 
   *skip = 0;
   
-  while ((k = strstr (k, "%")) != NULL)
+  while ((k = strchr (k, '%')) != NULL)
   {
     if (k[1] == 'k' || k[1] == 'K' || k[1] == 'h' || k[1] == 't' ||
 	      k[1] == 'z' || k[1] == 'b' || k[1] == 'y' || k[1] == 'a' ) {