video/gpu/lcms,vo_gpu_next: avoid returning bool from pointer functions

video/out/gpu/lcms.c

@@ -252,7 +252,7 @@ static cmsHPROFILE get_vid_profile(struct gl_lcms *p, cmsContext cms,
             const int intent = PL_INTENT_RELATIVE_COLORIMETRIC;
             cmsCIEXYZ bp_XYZ;
             if (!cmsDetectBlackPoint(&bp_XYZ, disp_profile, intent, 0))
-                return false;
+                return NULL;
 
             // Map this XYZ value back into the (linear) source space
             cmsHPROFILE rev_profile;
@@ -267,7 +267,7 @@ static cmsHPROFILE get_vid_profile(struct gl_lcms *p, cmsContext cms,
             cmsCloseProfile(rev_profile);
             cmsCloseProfile(xyz_profile);
             if (!xyz2src)
-                return false;
+                return NULL;
 
             cmsDoTransform(xyz2src, &bp_XYZ, src_black, 1);
             cmsDeleteTransform(xyz2src);
@@ -291,7 +291,7 @@ static cmsHPROFILE get_vid_profile(struct gl_lcms *p, cmsContext cms,
     }
 
     if (!tonecurve[0])
-        return false;
+        return NULL;
 
     if (!tonecurve[1]) tonecurve[1] = tonecurve[0];
     if (!tonecurve[2]) tonecurve[2] = tonecurve[0];

video/out/vo_gpu_next.c

@@ -627,7 +627,7 @@ static pl_tex hwdec_get_tex(struct priv *p, int n)
 #endif
 
     MP_ERR(p, "Failed mapping hwdec frame? Open a bug!\n");
-    return false;
+    return NULL;
 }
 
 static bool hwdec_acquire(pl_gpu gpu, struct pl_frame *frame)