WebVR fixes;

- Re-add the maf.c file that exports all the maf symbols.
- Fix lovrGpuTock for WebGL.

CMakeLists.txt

@@ -325,6 +325,7 @@ endif()
 set(LOVR_SRC
   src/main.c
   src/core/arr.c
+  src/core/maf.c
   src/core/platform.c
   src/core/ref.c
   src/core/utf.c

src/core/maf.c

@@ -0,0 +1,2 @@
+#define MAF_EXPORT
+#include "maf.h"

src/core/maf.h

@@ -7,7 +7,11 @@
 
 #pragma once
 
+#ifdef MAF_EXPORT
+#define MAF LOVR_EXPORT
+#else
 #define MAF static LOVR_INLINE
+#endif
 
 typedef float* vec3;
 typedef float* quat;

src/modules/graphics/opengl.c

@@ -1298,6 +1298,7 @@ double lovrGpuTock(const char* label) {
 
   return timer->ns / 1e9;
 #endif
+  return 0.;
 }
 
 const GpuFeatures* lovrGpuGetFeatures() {