Only displays flickering black-n-white shapes

This seems very similar to #4, but must have a different cause as I'm running the latest build that is using the 5.12 kde runtime (which was the fix for #4).

I'm running Debian Buster w/ Intel GPU HD5500.
Buster includes kernel 4.19 and Mesa 18.3.6.

Basically when I run it, it displays a box with black and white shapes flickering. I can him 'm' and get the menu to quit properly.

When started it displays multiple errors. I've cut-n-pasted the output below..

```
Failed to compile shader 'Vertex: v2f_c4f'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to compile shader 'Fragment: v2f_c4f'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to link program: error: linking with uncompiled/unspecialized shadererror: linking with uncompiled/unspecialized shader
Failed to compile shader 'Vertex: v2f_c4f_t2f'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to compile shader 'Fragment: v2f_c4f_t2f'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to link program: error: linking with uncompiled/unspecialized shadererror: linking with uncompiled/unspecialized shader
Failed to compile shader 'Vertex: blur1'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to compile shader 'Fragment: blur1'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to link program: error: linking with uncompiled/unspecialized shadererror: linking with uncompiled/unspecialized shader
Failed to compile shader 'Vertex: blur2'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to compile shader 'Fragment: blur2'. Error: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES

Failed to link program: error: linking with uncompiled/unspecialized shadererror: linking with uncompiled/unspecialized shader
[PresetFactory] url is idle://Geiss & Sperl - Feedback (projectM idle HDR mix).milk
No Textures Loaded from /app/share/projectM/textures
No Textures Loaded from /app/share/projectM/textures
unconnected: connecting...
connectHelper: "alsa_output.usb-Topping_D10-00.analog-stereo.monitor"
CREATED
READY
No Textures Loaded from /app/share/projectM/textures
No Textures Loaded from /app/share/projectM/textures
No Textures Loaded from /app/share/projectM/textures
No Textures Loaded from /app/share/projectM/textures

```