End current draw surface before drawing cinematic

Fixes drawing StretchPic *before* CIN_DrawCinematic resulting
in cinematic being drawn before the StretchPic.

code/renderergl1/tr_backend.c

@@ -737,6 +737,10 @@ void RE_StretchRaw (int x, int y, int w, int h, int cols, int rows, const byte *
 	}
 	R_IssuePendingRenderCommands();
 
+	if ( tess.numIndexes ) {
+		RB_EndSurface();
+	}
+
 	// we definately want to sync every frame for the cinematics
 	qglFinish();
 

code/renderergl2/tr_backend.c

@@ -830,6 +830,10 @@ void RE_StretchRaw (int x, int y, int w, int h, int cols, int rows, const byte *
 	}
 	R_IssuePendingRenderCommands();
 
+	if ( tess.numIndexes ) {
+		RB_EndSurface();
+	}
+
 	// we definately want to sync every frame for the cinematics
 	qglFinish();