lib: Rename fpi_im_resize() to fpi_img_resize()

Now that this name is free. This makes all the image manipulation
functions have the same "fpi_img_" prefix.

libfprint/drivers/aes3k.c

@@ -94,7 +94,7 @@ static void img_cb(struct libusb_transfer *transfer)
 
 	/* FIXME: this is an ugly hack to make the image big enough for NBIS
 	 * to process reliably */
-	img = fpi_im_resize(tmp, aesdev->enlarge_factor, aesdev->enlarge_factor);
+	img = fpi_img_resize(tmp, aesdev->enlarge_factor, aesdev->enlarge_factor);
 	fp_img_free(tmp);
 	fpi_imgdev_image_captured(dev, img);
 

libfprint/fpi-img-pixman.c

@@ -23,7 +23,7 @@
 
 #include "fp_internal.h"
 
-struct fp_img *fpi_im_resize(struct fp_img *img, unsigned int w_factor, unsigned int h_factor)
+struct fp_img *fpi_img_resize(struct fp_img *img, unsigned int w_factor, unsigned int h_factor)
 {
 	int new_width = img->width * w_factor;
 	int new_height = img->height * h_factor;

libfprint/fpi-img.h

@@ -47,7 +47,7 @@ struct fp_img {
 struct fp_img *fpi_img_new(size_t length);
 struct fp_img *fpi_img_new_for_imgdev(struct fp_img_dev *dev);
 struct fp_img *fpi_img_realloc(struct fp_img *img, size_t newsize);
-struct fp_img *fpi_im_resize(struct fp_img *img, unsigned int w_factor, unsigned int h_factor);
+struct fp_img *fpi_img_resize(struct fp_img *img, unsigned int w_factor, unsigned int h_factor);
 
 int fpi_std_sq_dev(const unsigned char *buf, int size);
 int fpi_mean_sq_diff_norm(unsigned char *buf1, unsigned char *buf2, int size);