Fix a typo

Change-Id: Ief8eea8fe6bef139d1e94f8d6dfac5a44efe785d

vp8/vp8_cx_iface.c

diff --git a/vp8/vp8_cx_iface.c b/vp8/vp8_cx_iface.c
index 8697377..fe88cd4 100644
--- a/vp8/vp8_cx_iface.c
+++ b/vp8/vp8_cx_iface.c
@@ -455,7 +455,7 @@
             ERROR("Cannot change width or height after initialization");
         if ((ctx->cpi->initial_width && (int)cfg->g_w > ctx->cpi->initial_width) ||
             (ctx->cpi->initial_height && (int)cfg->g_h > ctx->cpi->initial_height))
-            ERROR("Cannot increast width or height larger than their initial values");
+            ERROR("Cannot increase width or height larger than their initial values");
     }
 
     /* Prevent increasing lag_in_frames. This check is stricter than it needs