Fix improper structure dependency

I actually did compile that last commit and misread the failed projects
as 0.  I'm just going to put the conversion stuff in video-io.h stuff
because it requires it anyway, and video-scaler.h already depends on
video-io.h for the video_format enum anyway.

libobs/media-io/video-io.h

@@ -23,8 +23,6 @@
 extern "C" {
 #endif
 
-struct video_scale_info;
-
 /* Base video output component.  Use this to create a video output track. */
 
 struct video_output;
@@ -83,6 +81,28 @@ static inline bool format_is_yuv(enum video_format format)
 	return false;
 }
 
+enum video_scale_type {
+	VIDEO_SCALE_POINT         = 0,
+	VIDEO_SCALE_FAST_BILINEAR = 1,
+	VIDEO_SCALE_DEFAULT       = VIDEO_SCALE_FAST_BILINEAR,
+	VIDEO_SCALE_BILINEAR      = 2,
+	VIDEO_SCALE_BICUBIC       = 3,
+};
+
+enum video_colorspace {
+	VIDEO_CS_601              = 0,
+	VIDEO_CS_DEFAULT          = VIDEO_CS_601,
+	VIDEO_CS_709              = 1,
+};
+
+struct video_scale_info {
+	enum video_format     format;
+	uint32_t              width;
+	uint32_t              height;
+	bool                  full_range;
+	enum video_colorspace colorspace;
+};
+
 #define VIDEO_OUTPUT_SUCCESS       0
 #define VIDEO_OUTPUT_INVALIDPARAM -1
 #define VIDEO_OUTPUT_FAIL         -2

libobs/media-io/video-scaler.h

@@ -27,28 +27,6 @@ extern "C" {
 struct video_scaler;
 typedef struct video_scaler *video_scaler_t;
 
-enum video_scale_type {
-	VIDEO_SCALE_POINT         = 0,
-	VIDEO_SCALE_FAST_BILINEAR = 1,
-	VIDEO_SCALE_DEFAULT       = VIDEO_SCALE_FAST_BILINEAR,
-	VIDEO_SCALE_BILINEAR      = 2,
-	VIDEO_SCALE_BICUBIC       = 3,
-};
-
-enum video_colorspace {
-	VIDEO_CS_601              = 0,
-	VIDEO_CS_DEFAULT          = VIDEO_CS_601,
-	VIDEO_CS_709              = 1,
-};
-
-struct video_scale_info {
-	enum video_format     format;
-	uint32_t              width;
-	uint32_t              height;
-	bool                  full_range;
-	enum video_colorspace colorspace;
-};
-
 #define VIDEO_SCALER_SUCCESS         0
 #define VIDEO_SCALER_BAD_CONVERSION -1
 #define VIDEO_SCALER_FAILED         -2