no more ORANGE on effect memory failure

For maintainers of custom effects: replace "return mode_solid()" with "return mode_oops()"

Effect errors fall back to Akemi (2D) or Rainbow(1D) instead of SOLID ORANGE.

wled00/data/index.js

@@ -1977,7 +1977,7 @@ function readState(s,command=false)
 			errstr = "Buffer locked!";
 			break;
 		case  7:
-			errstr = "No RAM for buffer!";
+			errstr = "No RAM for pixel buffer!";
 			break;
 		case  8:
 			errstr = "Effect RAM depleted!";