Spelling fixes.

dlls/dsound/dsound_main.c

diff --git a/dlls/dsound/dsound_main.c b/dlls/dsound/dsound_main.c
index ea84913..840b805 100644
--- a/dlls/dsound/dsound_main.c
+++ b/dlls/dsound/dsound_main.c
@@ -103,6 +103,7 @@
  */
 struct IDirectSoundBufferImpl
 {
+    /* FIXME: document */
     /* IUnknown fields */
     ICOM_VFIELD(IDirectSoundBuffer);
     DWORD                            ref;
@@ -1361,7 +1362,7 @@
 	if (pwrite < pplay) pwrite += primarybuf->buflen; /* wraparound */
 	pwrite -= pplay;
 	if (pmix > (DS_SND_QUEUE * primarybuf->dsound->fraglen + pwrite + primarybuf->writelead)) {
-		TRACE("detected an underrun: primary queue was %ld\n",pmix);
+		WARN("detected an underrun: primary queue was %ld\n",pmix);
 		pmix = 0;
 	}
 	/* divide the offset by its sample size */
@@ -1535,8 +1536,8 @@
 	if ((writebytes == This->buflen) &&
 	    ((This->state == STATE_STARTING) ||
 	     (This->state == STATE_PLAYING)))
-		/* some games, like Half-Life, tries to be clever (not) and
-		 * keeps one secondary buffer, and mixes sounds into it itself,
+		/* some games, like Half-Life, try to be clever (not) and
+		 * keep one secondary buffer, and mix sounds into it itself,
 		 * locking the entire buffer every time... so we can just forget
 		 * about tracking the last-written-to-position... */
 		This->probably_valid_to = (DWORD)-1;
@@ -2746,7 +2747,7 @@
 	/* determine this buffer's write position */
 	DWORD buf_writepos = DSOUND_CalcPlayPosition(dsb, dsb->state & primarybuf->state, writepos,
 						     writepos, dsb->primary_mixpos, dsb->buf_mixpos);
-	/* determine how much already-mixed data exist */
+	/* determine how much already-mixed data exists */
 	DWORD buf_done =
 		((dsb->buf_mixpos < buf_writepos) ? dsb->buflen : 0) +
 		dsb->buf_mixpos - buf_writepos;
@@ -2935,6 +2936,7 @@
 	if (primarybuf->hwbuf) {
 		if (dsound->priolevel != DSSCL_WRITEPRIMARY) {
 			BOOL paused = ((primarybuf->state == STATE_STOPPED) || (primarybuf->state == STATE_STARTING));
+			/* FIXME: document variables */
  			DWORD playpos, writepos, inq, maxq, frag;
 			hres = IDsDriverBuffer_GetPosition(primarybuf->hwbuf, &playpos, &writepos);
 			if (hres) {

dlls/winmm/joystick/joystick.c

diff --git a/dlls/winmm/joystick/joystick.c b/dlls/winmm/joystick/joystick.c
index e25c30f..7965ed5 100644
--- a/dlls/winmm/joystick/joystick.c
+++ b/dlls/winmm/joystick/joystick.c
@@ -238,7 +238,7 @@
     if ((dev = JSTCK_OpenDevice(jstck)) < 0) return JOYERR_PARMS;
 
 #ifdef HAVE_LINUX_22_JOYSTICK_API
-    /* After opening the device it's state can be
+    /* After opening the device, its state can be
        read with JS_EVENT_INIT flag */
     while ((read(dev, &ev, sizeof(struct js_event))) > 0) {
 	if (ev.type == (JS_EVENT_AXIS | JS_EVENT_INIT)) {

dlls/winmm/time.c

diff --git a/dlls/winmm/time.c b/dlls/winmm/time.c
index 3656d74..0ce0aca 100644
--- a/dlls/winmm/time.c
+++ b/dlls/winmm/time.c
@@ -1,7 +1,7 @@
 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
 
 /*
- * MMSYTEM time functions
+ * MMSYSTEM time functions
  *
  * Copyright 1993 Martin Ayotte
  */

loader/task.c

diff --git a/loader/task.c b/loader/task.c
index 49fe403..1a3c2ee 100644
--- a/loader/task.c
+++ b/loader/task.c
@@ -448,7 +448,7 @@
 
 
 /***********************************************************************
- *           TASK_KillTask
+ *           TASK_ExitTask
  */
 void TASK_ExitTask(void)
 {