xcursor: Fix allocation based on string length

strlen() doesn't include the terminating NUL. Therefore when allocating a
block of memory to hold something equivalent to the length of the string we
must increment to take the NUL byte into consideration.

Signed-off-by: Rob Bradford <rob@linux.intel.com>

cursor/xcursor.c

@@ -757,7 +757,7 @@ _XcursorThemeInherits (const char *full)
 		if (*l != '=') continue;
 		l++;
 		while (*l == ' ') l++;
-		result = malloc (strlen (l));
+		result = malloc (strlen (l) + 1);
 		if (result)
 		{
 		    r = result;