obs-transitions: Fix non-exhaustive switch statements

plugins/obs-transitions/transition-stinger.c

@@ -343,8 +343,7 @@ get_tech_name_and_multiplier(enum gs_color_space current_space,
 	switch (source_space) {
 	case GS_CS_SRGB:
 	case GS_CS_SRGB_16F:
-		switch (current_space) {
-		case GS_CS_709_SCRGB:
+		if (current_space == GS_CS_709_SCRGB) {
 			tech_name = "DrawMultiply";
 			*multiplier = obs_get_video_sdr_white_level() / 80.0f;
 		}
@@ -358,6 +357,9 @@ get_tech_name_and_multiplier(enum gs_color_space current_space,
 		case GS_CS_709_SCRGB:
 			tech_name = "DrawMultiply";
 			*multiplier = obs_get_video_sdr_white_level() / 80.0f;
+			break;
+		case GS_CS_709_EXTENDED:
+			break;
 		}
 		break;
 	case GS_CS_709_SCRGB:
@@ -370,6 +372,9 @@ get_tech_name_and_multiplier(enum gs_color_space current_space,
 		case GS_CS_709_EXTENDED:
 			tech_name = "DrawMultiply";
 			*multiplier = 80.0f / obs_get_video_sdr_white_level();
+			break;
+		case GS_CS_709_SCRGB:
+			break;
 		}
 	}