Fix sim-eng build and simplify previous lcd-density related patch
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index 971189f..eec645e 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -189,16 +189,13 @@
     
     
     char property[PROPERTY_VALUE_MAX];
-    if (property_get("ro.sf.lcd_density", property, NULL) <= 0) {
-        LOGW("ro.sf.lcd_density not defined, using 160 dpi by default.");
-        strcpy(property, "160");
-    }
-
-    /* Override the property value if qemu.sf.lcd_density is defined. */
-    {
-        char  qemu_property[PROPERTY_VALUE_MAX];
-        if (property_get("qemu.sf.lcd_density", qemu_property, NULL) > 0) {
-            strlcpy(property, qemu_property, sizeof property);
+    /* Read density from build-specific ro.sf.lcd_density property
+     * except if it is overriden by qemu.sf.lcd_density.
+     */
+    if (property_get("qemu.sf.lcd_density", property, NULL) <= 0) {
+        if (property_get("ro.sf.lcd_density", property, NULL) <= 0) {
+            LOGW("ro.sf.lcd_density not defined, using 160 dpi by default.");
+            strcpy(property, "160");
         }
     }
     mDensity = atoi(property) * (1.0f/160.0f);